Friday, October 21, 2016 5:10 AM. For more information. Contact Lenses. 96 ± 0. To see if gas permeable lenses are right for you, call our office in Laurel Springs, or click here for more info. Gas Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. • If there is poor lens translation, flatten the base curve to aid translation. We have multifocal soft and gas permeable multifocal lenses. Methods: Over 100 established GP fitters and educators met to discuss the parameters proposed in educational material for evaluating GP fit and concluded on the key parameters that should be recorded. If the lens is stuck on the white of the eye, use the pad of your fingertip to gently press your eye just outside the edge of the lens to break the suction that is keeping the contact stuck in the eye. Soft bifocal contact lenses sometimes have the near power in the center (center-near). BOOK EXAM! Hours & Location; Eye Care Clinic. Edwards K. These lenses also are called GP lenses, rigid gas. Gas Permeable Contact Lenses and Orthokeratology. Randomised controlled trial of corneal vs. Rigid gas permeable contact lens correction of aphakia following congenital cataract removal during infancy. Disposable (Replacement Schedule) Contact Lenses. In fact, myopia control contact lenses can slow myopia progression by up to 59%. Summary. [email protected] is a Gas Permeable (GP) lens? GP contact lenses are made of a firm, durable plastic that transmits oxygen. When the GP lens is stuck on the white of the eye, you need to break the suction holding it. Password. Contact Lenses. This reduces the risk of eye problems caused by hypoxia (reduced oxygen supply). This unique patented formula is not sold to any retailer as a store brand. Hybrid multifocal contact lenses can be fabricated in both a concentric and aspheric progressive lens design. Gas Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. Insertion of a gas permeable scleral contact lens might be reported with the unlisted ophthalmological service or procedure code (92499). Lens Comparison. J Am Optom Assoc 56(3): 184-189, 1985; Silbert JA: Take the bother out of bitorics. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. Multifocal lenses tend to be the concentric type, meaning the different powers in the lens radiate out from the center of the lens to the outer edges. Dr. “There are some options that can make a big difference,” Dr. 1-855-286-2020. Gas permeable (GP) contact lenses, AKA rigid gas permeable (RGP) lenses, are hard contact lenses that allow oxygen to pass through the lens to the eye. Rigid gas-permeable contact lens problem solving. These lenses also are called GP lenses, rigid gas permeable lenses, RGP lenses, and oxygen permeable lenses. Gas Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. Our Company. Additionally, the practitioner has complete control over the lens parameters and the lenses can be made in high Dk materials. 5916) Regulatory . Gas permeable (GP) contact lenses, also known as rigid gas permeable (RGP) lenses, are rigid contacts made of silicone-containing compounds that allow oxygen to pass through the lens material to the eye. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. 4 percent of this age group), and 33. GP contact lenses are custom made for each patient based on the eye’s individual curvature, size, corneal shape. Your contact will be uncomfortable and won’t provide clear vision. Of the various types of gas permeable lenses, the most underutilized and underrated are small-diameter corneal GP lenses. 1,2 Toric lenses have two powersFits up to 95% of all contact lens candidates. Call Now! 623-933-2013 . Gas Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. 85mm), a steeper base curve lens was ordered (7. Gas permeable contact lenses is the term given to rigid lenses made of durable plastic that transmits oxygen (soft cotact lenses are also gas permeable). 0 to 9. It is. Furthermore, the space between the cornea and the back of the scleral lens acts as a fluid. 21 If you have mild keratoconus, which does not progress (get worse over time), contact lenses may be the best and only treatment needed. Even switching from one brand of hydrogen peroxide cleaner to another can damage your lenses. This allows to bypass severe corneal irregularities. To understand soft contact lens (SCL) and gas-permeable (GP) lens wearers' behaviors and knowledge regarding exposure of lenses to water. Lambert SR, Ward MA. Chapter 1: Gas Permeable (GP) Contact Lenses Market Product Definition, Product Types, Volume, and Revenue Analysis of Each Type in North America, Europe, Asia-Pacific, Latin America, Middle East. 5 percent of adolescents), 7. 38 mm. • Over-refract and adjust the lens power if necessary. Make an appointment at Bethesda Vision Care. Advantages of Gas Permeable Lenses. West Linn, OR 97068 Re: K202860 Trade/Device Name: Valley Contax Single Vision (SV) Gas Permeable Contact Lens (roflufocon D,. We've been serving eyecare professionals since 1981 with contact lenses that are powerful, intuitive and effective and by delivering unparalleled support to go along with them. Lens adherence, although it generally does not go unmentioned. 824. Gas permeable contact lenses are rigid lenses made of durable plastics that allow oxygen to pass through the lens. Hydrogen Peroxide Disinfecting Solution for Gas Permeable Contact Lenses: A Review of the Antimicrobial Efficacy,. Specialized Uses of. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. It occurs during soaking overnight. 67 ± 0. Many independent laboratories are members of the Contact Lens Manufacturers Association. Disadvantages of Gas Permeable Contact Lenses. Located at 36330 Hidden Springs Rd. Irregular cornea patients who have switched from corneal GP lenses to sclerals report improved comfort,. 30 and. Call us today at (212) 235-1031 for an appointment! Gas Permeable (GP) Contact Lenses. MMA contact lenses are rigid contact lenses that look like GP lenses but are made of a plastic material that is not oxygen permeable. GP lenses allow more oxygen to reach the front surface of the eye. Read More. 50 x 180, and Ks are 44. There are two categories of contact lenses based on. Gardner, MA . The question of which contact lens is best for you should ultimately be decided in. Contacts can be either soft or gas permeable (GP). ODs must be aware of the hidden links among glaucoma symptoms, medication, and contact lenses with respect to how ocular surface disease (OSD) affects patient outcomes. Boston Simplus Contact Lens Solution Kit, for Gas Permeable Contact Lenses, 3. Jul-Aug 1992;29(4):243-245. Looking at many other typical fitting guides. Store lens dry or in conditioning solution (Unique pH, Boston Advanced, Boston Conditioning Wettability of GP contact lens materials. , a privately held company based in Cincinnati, Ohio and its partner company MidSouth Premier Ophthalmics, based in Brentwood, Tenn. 00 to £40. RGP contact lenses are made from hard, oxygen-permeable material. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. 58. Call 856-205-4141. New hybrid lens options are opening up treatment possibilities for patients with unusual visual needs. Northeast – $107. Contact our team of specialty contact lens consultants to learn about. Lippincott, Williams, and Wilkins. The Valley Contax SV, AFM, and VK Gas Permeable Contact Lenses (roflufocon D, roflufocon E, tisilfocon A. According to the Amsler–Krumeich classifications, we included 18 eyes in stage 1, 35 eyes in stage 2, and 28 eyes in stage 3. Find a variety of affordable and high-quality lens solution from top brands. Contact him at (515) 243-1667. Extended Wear: can be worn overnight. Modification of contact lens may be reported using CPT code 92325 when performed separately. Contact Lenses. Before the introduction of soft lenses. The Nation's #1 Multifocal GP! The Renovation and Renovation E multifocal are developed with the needs of the mature presbyope in mind making it perfectly suited for patients with add powers of +2. Crafted from a patented oxygen-permeable material that allows your eyes to breathe, the low-maintenance contact lenses are. J Am Optom Assoc. 75 or more astigmatism • You must evaluate lens rotation • Markings are typically at 6:00 Remember LARS • Left add; right subtract from the SPECTACLE refraction • Each clock hour is approximately 30 degrees • Let’s do an example. GP. Contact lens wearing time. . Several types of hybrids are available, including multifocal designs. Dry Eyes Quiz;. Enhanced comfort through edge lift control. RGP. The children were given Claris solutions (Menicon USA. 5916 Regulation Name: Rigid Gas Permeable Contact Lens Regulatory Class: Class II Product Code: HQD Dated: January 30, 2017 Received: February 2, 2017 Dear Mr. Rigid Gas Permeable Contact Lenses Place rinsed lens in original lens case. (Don’t massage your eyelids. Rigid Gas-Permeable Contact Lens (RGPs) merupakan lensa kontak yang bahannya lebih kaku dan tahan lama ketimbang soft contact lens. Gas permeable lenses provide a better oxygen supply than most soft lenses because: In terms of comfort, visual clarity and stability, scleral lenses are superior to gas permeable lenses. 2374Gas Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. 49 will be used here) and the index of the tear lens (n = 1. A large gas permeable contact lens, the G. Gas permeable contact lenses (also called GP or RGP contacts) are an alternative to soft lenses. Greenfield, MA . Vision correction is getting better by the day. Because of the strong material and the ability to diffuse oxygen, GP. These lenses are custom-made to fit the patient's eye and correct the multiple focal points. Rigid gas permeable or simply gas permeable (GP) lenses can be mistaken for the hard contacts of the past, but they are much more flexible, comfortable, and allow oxygen to get to. Clear Care is a convenient and highly effective hydrogen peroxide based system for simultaneous cleaning, daily protein removal and disinfecting of soft (hydrophilic) and rigid gas permeable lenses as recommended by. Winchester Optical's contact lens division was established in 1969 and has produced the highest quality spherical, toric and specialty rigid gas permeable lenses (RGP's) since their availablity. 00 per month. Click-to-Call 860-635-6149. Both GP lenses and thick, stiff soft lenses can cause corneal warpage. Valley Contax is a custom GP (gas permeable) contact lens manufacturer located in Eugene, Oregon. ICD GP Lenses. Harrison Hot Springs Resort & Spa: Wonderful relaxing hotel! Great staff, excellent pools! - See 4,571 traveler reviews, 1,569 candid photos, and great deals for. 0 to 9. Most people choose soft. I. Gas Permeable (GP) Contact Lenses. These rigid lenses aren’t as popular or well-known as soft lenses, but they offer the advantages of durability, crisp vision and high oxygen permeability. A standardized fitting protocol that included complete CLs information. Back toric (only) lenses can be used when the amount of refractive cylinder is greater than the amount of corneal cylinder. Dry Eyes: One of the more common complaints among people who wear contacts is dry eyes. • If the near segment is too far into the papillary area, truncate the lens to lower the segment height. 00D of residual astigmatism when this patient is fit with a spherical lens. Optician. Am J Optom & Physiol Opt 1987;64:313-320. GP lenses allow your eyes to “breathe” better. GP lenses have a smaller diameter than soft contacts, meaning. Allow for 3-24 hours soaking. Approved for all Soft & RGP Contact Lenses. These lenses also are called GP lenses, rigid gas permeable lenses, RGP lenses and oxygen permeable lenses. X-Cel Specialty Contacts understands the critical need for eye care professionals to have a choice when it comes to prescribing specialty GP lenses for the management of myopia for patients of all ages. 7mm of vision. They generally provide excellent vision, even in the presence of astigmatism. Hashemi H, Shaygan N, Asgari S, et al. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. Gas permeable lenses provide a better oxygen supply than most soft lenses because:In terms of comfort, visual clarity and stability, scleral lenses are superior to gas permeable lenses. Contact lens wearing time. It occurs during soaking overnight. Fitchburg, MA . 50mm). 96 ± 0. Gas Permeable (GP) Contact Lenses. Book Appointment Call 1. We also proudly offer our in house multifocal design (High. For rigid gas permeable lenses. Name: Daily wear rigid gas permeable contact lens . These two factors decrease the risk of eye problems with gas permeable lenses, compared with wearing soft contacts. 6 million adolescents ages 12 to 17 years (14. Gas Permeable Lenses. Paragon Vision Sciences (cont'd. West Springs. The optics of these lenses are separated vertically, similar to progressive spectacle lenses, rather than in a concentric design like other multifocal contact lenses. GP contact lenses are rigid, but they shouldn’t be confused with old-fashioned hard contact lenses, which are now obsolete and made of a material known as PMMA. This increases comfort, health and safety during contact lens wear. Hard ( PMMA) lenses, the original type of contact lens, now virtually obsolete. Hybrid lenses try to combine the vision quality of rigid lenses with the comfort and stability of soft lenses, and they are a reasonable treatment for many keratoconic patients. GP contact lenses offer numerous benefits and advantages, including:. Disadvantages of Gas Permeable Contact Lenses. Gas Permeable Lenses. West Springfield Office; Careers; Contact; PAY BILL ONLINE. Because GP lenses are made with oxygen-permeable silicone, they allow more oxygen to reach the front surface of the eye than traditional hydrogel soft. Which factors influence RGP lens. These lenses, called corneo-scleral lenses, generally are approximately 13 to 15 mm in. What are gas permeable contact lenses? Gas permeable lenses are rigid lenses. Multifocal lenses tend to be the concentric type, meaning the different powers in the lens radiate out from the center of the lens to the outer edges. Most GP lenses contain silicone that is oxygen permeable, so oxygen can pass through the lens giving greater comfort and. What is a Gas Permeable (GP) lens? Why GP. Gas. Frequently bought together. For lenses from 16mm to 30mm, a larger case may. All are FDA. Gas permeable lenses provide a better oxygen supply than most soft lenses because:. 2019 May 8. He is a Diplomate in the Cornea, Contact Lenses and Refractive Technologies section of the American Academy of Optometry. The advent of soft disposable contact lenses permanently altered the contact lens landscape, resulting in the decline of corneal gas permeable (GP) lens fitting. 14. Gas-Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses and are made from a. Advantages of Gas Permeable Contact Lenses. Gas Permeable (GP) Contact Lenses. 1. Gardner, MA . Gas Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. 0mm pupil, the distance zone size is still 2. GP contact lenses are also known as rigid gas permeables, or RGPs. ClearKone lenses are the first FDA cleared hybrid contact lenses specifically designed for keratoconus vision correction and other corneal irregularities. This offers clearer vision and a lower risk of eye infections. 824. Product Code: HQD For new, premium spherical lenses, aim for a gross margin of 47%; for torics and multifocals, a 50% gross margin; and for gas permeable (GP) lenses and specialty vial products, a 60% gross margin. 50 @ 090, you would expect there to be 1. Hassle-Free Ordering & Express Delivery. Advantages of gas permeable lenses. S. These lenses have excellent optics and can mask several diopters of regular and irregular astigmatism. But problems can also happen with GP contacts. 2mm, is designated for near. This is an allergic condition, often due to protein build-up on contact lenses, as well as an eye allergy to components of contact lens storage solutions. — ABB Optical Group, a leading distributor of optical products, is acquiring Diversified Ophthalmics, Inc. It's an excellent choice for people with sensitive eyes, dry eyes, or astigmatism. When considering contacts for hard-to-fit eyes, such as eyes with irregular astigmatism and/or corneal scarring, most eye doctors recommend rigid gas permeable (RGP or GP) contact lenses. We believe in what we do, that every contact lens we. Bennett ES, Egan DJ. This allows to bypass severe corneal irregularities. Aspects of contact lens wear were compared for children remaining in their original treatment group. Extended Wear Contact Lenses. They have proven to become a very successful replacement for hard lenses (PMMA). Methods: Over 100 established GP fitters and educators met to discuss the parameters proposed in educational material for evaluating GP fit and concluded on the key parameters that should be recorded. Soft contact lenses include: Daily Wear: can be worn up to 18 hours but must be removed and cleaned at night. Contact lenses can cost anywhere from $150 to $1,500 a year, depending on the brand, type, and your. Among controls, repeat biometry readings were taken a median of 2 days (IQ range 1. Eyeglasses & Contacts; Insurance; Located on 10336 W Coggins Drive, Suite A, Sun City AZ. Vision Professionals - Sunbury. 13. Success of Rigid Gas Permeable Contact Lens Fitting Eye Contact Lens. Uçakhan ÖÖ, Yeşiltaş YS. While most toric lenses are soft and designed to stay in place, gas-permeable lenses may be recommended if lens rotation. GAS-PERMEABLE CONTACT LENSES The cornea, or front of the eye, requires a supply of oxygen from the atmosphere to remain healthy. GP contact lenses are rigid, but they shouldn't be confused with old-fashioned hard contact. Corneal GP Lenses The conventional standard for managing keratoconus has been corneal GP lenses. Optometrist in West Jordan, Utah. Maller is in private solo practice in Fort Lauderdale, FL. See if gas permeable contact lenses are the right option for you. Contraindications (Reasons not to use): Do not use this solution if you are allergic to any ingredient in this product. Methods: Subjects were 116 8- to 11-year old children in the Contact Lenses and Myopia Progression Study. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. 00 diopters and astigmatism less than -1. Their ability to transmit oxygen reduces eye problems. Looking at many other typical fitting guides, manufacturers often recommend DK 100. Well known for their exceptional visual performance, GP lenses, also referred to as gas permeable or rigid gas permeable (RGP) lenses, are often not immediately associated with enhanced safety. 301-656-0775. Soft contacts are great at. Advantages of gas permeable lenses. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. Gas Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. This reduces the risk of eye problems caused by hypoxia (reduced oxygen supply). Their ability to transmit oxygen reduces eye problems such as dry eyes caused by reduced oxygen that are common in many brands of soft lenses or hard (non-GP) lenses. GP contact lenses are rigid, but they shouldn't be confused with old. 7 out of 5 stars. These lenses are rigid in the center for higher visual clarity but soft at the edges for more comfort. PAY BILL ONLINE. WEST VILLAGE EYECARE ASSOCIATES is your local Optometrist in New York, NY serving all of your needs. The four main factors you need to consider are: Lens material. 2mm near-center design, while the aspheric lens design has a 3. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. GP lenses are durable and long-lasting. Acuvue Oasys for Astigmatism 6 PK Contact Lenses – $34. With over 35 million lenses ready to go, we have what you need. West – $125. Read More. Gas Permeable (GP) Contact Lenses. In the last year, two new GP materials were launched that may be useful in the fitting of scleral lenses. ) (1) IS0/Fatt method (2) UV absorber/inhibitors available. In cases of corneal irregularity or severe sensitivity, scleral lenses are often the only viable option. 21. The BCVAs with spectacles and CL were 0. If a patient has a 6. com (Do not send personal health information by email. On opening day, Contamac was excited to announce the launch of Nutrifill, an FDA cleared (K181566) preservative-free saline solution with 5 essential electrolytes for filling and rinsing scleral, hybrid,. Usage: Discard solution 90 days after opening. Generally, they cost between $20 and $30 a box. Table 2 shows the mean BOZR of the diagnostic lens. GP lenses are currently less popular than soft. What are gas permeable contact lenses? Gas permeable lenses are rigid lenses - in many ways, they're similar to hard lenses but are porous to oxygen. These lenses, compared to their more popular soft lens counterparts, are more conducive to good eye health (smaller. With over 50 years of experience in manufacturing gas permeable contact lenses, you can count on our lab’s state-of-the-art equipment, cutting-edge technology, and top quality materials to provide your patients with exceptional service and GP lenses. B. GP lenses are durable and long-lasting. The proof is in the numbers. 00 per month. Advantages of Gas Permeable Lenses. Van der Worp E, Bornman D, Ferreira DL, et al. Benefits of GP or RGP Contact Lenses. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. September 2015. Gas Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. Any GP lens refit. Hybrid and gas permeable lenses require more time and expertise to get a precise fitting, so factor that into your buying decisions. GP lenses allow your eyes to "breathe. The soft material in these shoes acts as an air channel, allowing oxygen to freely flow throughout your cornea, making them more comfortable and healthier. Tangible Hydra-PEG is a coating added to GP contact lenses at the time of production. With over 35 million lenses ready to go, we have what you need. Classification . Rigid gas-permeable lens problem solving. Hard contact lenses are often the next step in treating more-advanced keratoconus. S. Contact Lens Spectrum. DESCRIPTION OF LENSES The OPTIMUM GP series of contact lenses are fabricated from the hydrophobic contact lens materials (roflufocon A), (roflufocon C), (roflufocon D), & (roflufocon E). 9 million. They are also used in Orthokeratology (ortho-k), a vision correcting procedure in which you wear the lenses at night to reshape your cornea for. According to the most recent data published by the U. 4 percent of this age group), and 33. Accordingly, proper care of GP lenses is instrumental in ensuring successful wear. . 5 Fl Oz Multi-Action Solution, 0. Another category of gas permeable lenses bridges the size gap between conventional GP lenses and mini-sclerals. 15 (Snellen chart), respectively. The new solution. If you have a high prescription or astigmatism, contact lenses may provide more enhanced vision correction than glasses. There are specific HCPCS codes for scleral lenses: S0515 Scleral lens, liquid bandage device, per lensThis is a process that occurs during soaking. Gas. This data demonstrates that the majority of corneas are flatter nasally, which can cause soft lenses to decenter towards the nose. or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. Although both custom soft toric and gas permeable (GP) toric contact lenses could be utilized in this case, M. gas permeable contact lenses typically last up to 1 year. In many ways they are similar to hard lenses but are porous to oxygen. Effective lens cleaning solution for gas permeable (GP) and hard contact lenses. Hybrid and scleral contact lenses are increasingly prescribed as a first-line treatment for keratoconus. 107 West Portal Ave San Francisco, CA. Allow for 3-24 hours soaking. PAY BILL ONLINE. It launched in 2017. Stay Home, we've got you covered! (November 17th - fully stocked & shipping) 1-800-570-LENS (570-5367) Login. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. Uniquely adaptable multifocal contact lens designs for outstanding all-round vision. About a decade or two ago, you might have thought that you had seen it all when hard contact lenses were ruling the day. Purpose : Contact lens surface dryness, deposit accumulation, and discomfort are crucial factors leading to patient dissatisfaction while wearing gas permeable (GP) contact lenses. Scleral lenses are larger in diameter than RGP lenses and do not touch the cornea; they vault over it. Soft bifocal contact lenses sometimes have the near power in the center (center-near). Gas Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. Your eye doctor may call them GPs or RGPs. Coral Springs, FL 33065 800-852-8089. Rigid Gas Permeable Contact Lenses Place rinsed lens in original lens case. GP lenses. GP lenses are currently less popular than soft lenses but offer a number of advantages and are continuing to improve as research and technology advance. 1. 2020 Sep;35:32-34,36,37,51. Sharp vision. Although fitting GP lenses for astigmatism may. 1-800-GET-LENS ® - Gas Permeable Contacts - LOWEST PRICE GUARANTEE on all Gas Permeable contact lenses. Boston Advance Contact Lens Solution by Bausch+ Lomb, for Gas Permeable Contact Lenses, 1 Fl Oz (Packaging May Vary) #1 Best Seller . Monday. or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses that are made from a hard, oxygen permeable material. Another category of gas permeable lenses bridges the size gap between conventional GP lenses and mini-sclerals. 00 -3. Centers for Disease Control and Prevention (CDC), an estimated 45 million Americans wear contact lenses — including 3. Purpose: To develop a new schematic scheme for efficiently recording the key parameters of gas permeable contact lens (GP) fits based on current consensus. Many types of lenses can be used in the management of patients who have undergone corneal transplantation (ranging from full-thickness keratoplasty to anterior and posterior lamellar keratoplasties), including custom soft. Fitchburg, MA . One of the main differences between hard and soft contact lenses is crispness of vision.