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The Art of Contact Lens Design
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Denver Art Museum
TELEPHONE: 303-384-1111
FAX: 303-384-1124
FREE PHONE: 1-888-393-5374
E-MAIL: info_avtlens.com
14828 West 6th Avenue
Suite 15-B
Golden, CO 80401
Optimum by Lobob® Hand Soap is formulated specifically for contact lens wearers to thoroughly clean their hands prior to handling contact lenses.
NEW! Optimum GP Care System Is The Best Solution You Can Recommend To Your Patient! Optimum Eliminates Hazy, Foggy Lenses And Keeps The Contacts Clean To Aid In Comfort! Compliance Makes Sense!
Call today for your FREE sample starter Kits.
Retail contact lens care products available, call for discounted pricing.
Its the only solution that adjusts to your own tear chemistry for a customized comfort you can feel.
Made especially for gas perm lenses, Unique-pH® cleans, conditions and disinfects all in one bottle. It treats your lensesand your eyeslike no one elses. For customized comfort you can feel, give Unique-pH® a try.
Naturalens RDS Contact Lens Solution - Rinsing, Disinfecting & Storage Multipurpose Solution removes protein from your GP (Gas Permeable) and Soft (Hydrophilic) contact lenses while you clean and disinfect your lenses daily. Daily use of Naturalens RDS Contact Lens Solution may eliminate the need for a separate enzymatic cleaner. No saline solution is required with the Naturalens RDS Contact Lens Solution.
Naturalens GP Cleaner is a sterile cleaning, disinfecting, and storage solution for use with fluorosilicone acrylate and silicone acrylate rigid gas permeable (RGP) and hard contact lenses. WARNING: DO NOT PUT IN THE EYE. SOLUTION MUST BE COMPLETELY RINSED.
Do you or your patients sometimes have hazy foggy gritty feeling lenses? The solution may be the problem.
Our Naturalens product is the perfect choice of premium lenses for your patients. One of the key elements of the lens is the VIP (Variable Inverse Peripheral) Technology to help with perfect fit as well as better tear layer! Below are few pages to further inform you of the lens.
Advanced Vision Technologies
Specializes in products for the Astigmatic Cornea.
Bitoric, Back Toric and Front Toric Designs are available with FREE consultation available.
Toric lenses of any design can be ordered Warranted by providing an AVT Consultant with K Readings or Sim K readings along with a Spectacle RX.
Topographical maps can be received via color fax or by emailing to keith_avtlens.com
Multifocal Contact Lenses represent one of the most profitable modalities and rewarding services offered in todays Ophthalmic Practice.
Advanced Vision Technologies provides solutions to the demands of the presbyopic patient. AVT consults, designs and manufactures several options for the emerging, moderate and mature presbyopic patient.
Consistent Quality is a must when prescribing multifocal contact lenses. AVT utilizes a highly sophisticated Interferometer surface quality and radius evaluation system measuring your success in microns.
Fitting sets are available when needed. Many designs are highly successful with simply providing your AVT consultant K readings or Topographical Simulated Ks and a Spectacle RX.
Products for the emerging, moderate and mature patient.
Lenses for Presbyopic Patients
Naturalens Progressive Front Surface Multifocal Design features +1.50, +2.00 & +2.50 add powers (Fit alignment on K)
Varifocal Family of Progressive Back Surface Multifocal Designs (Fit steeper than flat K)
Acuity Plus combines mild asphericity on the base curve to accommodate a comfortable fitting relationship with a compound aspheric front surface to provide higher add multifocal options. (Fit slightly steeper than flat K)
Tangent Streak contact lenses offer precise correction for your near, intermediate and distance vision. TANGENT STREAK gives you the vision traditionally provided by bifocals and progressives but without the glasses.
Avt is experienced in many and all types of multifocal contact lenses. Call your AVT consultant with any questions concerning multifocal designs
Lenses For Keratoconus Patients
Naturalens design featuring the VIP Technology is a simplified approach in managing the highly astigmatic and irregular cornea. Diameters of 10.8, 10.3 and 9.8 allow the fitting of a larger lens with comfortable results and excellent vision. The Naturalens 10.8 Enhanced Diameter works great with pellucid marginal degeneration related corneal conditions.
VIP Cone design featuring the patent pending VIP (Variable Inverse Periphery) Technology
Is an advanced alternative to traditional designs. Featuring a larger OZ than current popular designs, the VIP provides better visual acuity with less glare and flare combined with a healthy comfortable peripheral alignment resulting in an improved overall fitting relationship.
Traditional Soper and McGuire Cone designs are also available for a variety of nipple, oval, or globus cone conditions.
The irregular cornea represents one of the most challenging of contact lens modalities.
Advanced Vision Technologies specializes in experienced informational consultation for Keratoconus conditions.
A variety of both Custom Soft and GP lens designs for diseased, trauma related and post surgical conditions resulting in irregularities of the corneal shape and visual axis are available from AVT.
Pellucide
Naturalens featuring the VIP Technology is a simplified approach in managing the high astigmate and irregular cornea. Diameters of 10.8, 10.3 and 9.8 allow the fitting of a larger lens with comfortable results and excellent vision.
Dyna Intra-Limbal featuring a 11.2 standard diameter is effective in vaulting central irregularities. A flatter or steeper peripheral alignment system is available for the variability needed in proper peripheral corneal relationships.
SOFT K The Soft K lens from Soflex is the PERFECT fit for your Keratoconus patients. This soft lens is thicker, resulting in a GP like fit with better comfort. One of the Key components is that the lens has two fenstration holes on either side of the lens to release oxygen bubbles lying underneath the lens. This helps with the tear layer for better acuity.
Advanced Vision Technologies offers one of the most experienced Corneal Reshaping Consultation Resources in the United States. Extensive experience is available in Certification of CRT and VST Corneal Reshaping modalities.
Staff training Patient Education tools are available through AVT. Proper training and education are key in developing a successful Corneal Reshaping Program for any
Contact Lens Practice.
Experienced in Myopic, Hyperopic and Presbyopic designs to accommodate all types of patients desiring to be free of daily contact lens or spectacle requirements are available at AVT.
Lenses For Corneal Reshaping
CRT (Corneal Refractive Therapy)
Custom Corneal Reshaping
MCR (Myopic Corneal Reshaping)
HCR (Hyperopic Corneal Reshaping)
AVT is experienced in accomodating in custom Toric applications for Corneal Reshaping
If you are a Doctor's Office, please visit this link to place your order
The Soft K lens from Soflex is the PERFECT fit for your Keratoconus patients. This soft lens is thicker, resulting in a GP like fit with better comfort. One of the Key components is that the lens has two fenstration holes on either side of the lens to release oxygen bubbles lying underneath the lens. This helps with the tear layer for better acuity.
Indicated For:
Karatoconus
Post Surgical Patients
RK, PRK, Lasik, PKP
Founded in 1945, Alcon traces its roots back to two pharmacists, Robert Alexander and William Conner, who opened a small pharmacy in Fort Worth, Texas, and combined the first syllables of their last names to create the name Alcon.
Key Facts
Majority owned by Novartis AG as of August 25, 2010 and incorporated in Hünenberg, Switzerland with U.S. operations based in Fort Worth, Texas, our team of over 15,500 dedicated employees worldwide develops, manufactures, and distributes hundreds of eye care products in more than 180 countries. This seasoned and diverse group of people, who encircle the globe, are united by a common mission: to make Alcon the most trusted eye care company worldwide and the first choice of eye care professionals and their patients.
Alcon's core business is centered on three key divisions Surgical, Pharmaceutical and Consumer Vision Care. As of 2009, sales reached US$6.5 billion.
In March 2002, Alcon conducted a partial initial public offering (IPO) on the New York Stock Exchange (NYSE) of approximately 25 percent of its shares, with Nestlé S.A. retaining approximately 75 percent. Novartis AG acquired its 77 percent majority ownership in a two step transaction with Nestlé S.A. In July 2008, Novartis purchased from Nestlé S.A. approximately 25 percent of Alcon shares. In August 2010, Novartis acquired the remaining 52 percent of Alcon shares that Nestlé owned, completing the second step of the transaction to become Alcons majority owner. The remaining 23 percent of Alcon shares are traded publicly on the New York Stock Exchange (NYSE: ACL). Nestlé no longer owns any shares in Alcon.
OPTI-FREE® GP Hard Contact Lens Solution offers all-in-one lens care for patients who wear rigid gas permeable (RGP), or "hard," contact lenses. Formerly known as UNIQUE-pH® solution, OPTI-FREE® GP uses the same trusted formula to clean, condition and disinfect RGP lenses for all-day comfort.
The Acuity Plus is an aspheric design that is fit slightly steeper than the flattest K reading. This lens contours to the cornea for greater comfort. The Acuity Plus is used for presbyobic patients who require and add of up to +2.50.
Candidates
This lens works best for patients who require adds up to +2.50. This lens will work for the following patients:
Patients wearing a multifocal lens but need a higher add power for reading
Soft lens wearers with astigmatism
Contact lens drop outs
Current GP wearers who have distance vision only or monovision
Non-contact lens patients
Selecting the Base Curve
The design of the Acuity Plus is fit a little steeper than the flat K reading. The initial lens for Patients who have two dipoters or less of with the rule astigmatism should be fit .75 diopters steeper than the flat K reading. Patients who have 2.12 diopters of with the rule astigmatism, start with a lens one diopter steeper than the flat K reading.
Diameter
The 9.5 diameter fits the average corneal K readings. The K readings of 41.7546.50 work best with the 9.5 diameter. If the K reading is 41.67 and flatter, a larger 9.7 diameter is best. For corneas with a K reading of 46.67 and steeper, a smaller 9.2 diameter performs
Selection Of Cone Design
When looking at the Topography Map, the VIP Cone works best with cones located in the central part of the cornea. The VIP Cone helps eliminate halos/flaring of lights due to the unique optic zone and comfort is increased with the Variable Inverse Periphery Technology™. If the cone is centered in the lower part of the cornea or is pellucid, the Naturalens 10.8 Diameter lens may be the best design for this type of Keratoconus.
Base Curve Selection
The initial selection of the base curve is simple. Take the average of the Sim K Readings. For example: The Flat K Reading is 46:00 and the Steep K Reading is 50:00, the average K Reading would be 48:00. Select the 703 (48:00) Base Curve as your first Trial Lens. A well fitting lens should have minimal apical clearance. A mild Three Point Touch pattern is acceptable.
Selecting Lens Diameter
The VIP Cone Fitting Set has two diameters, 8.4 and 9.0. The 9.0 diameter is more common but on more advanced cones, the 8.4 diameter may perform best. (The steeper the cone, a smaller lens is the rule) Custom diameters are available if requested.
Peripheral Fit
Trial lenses have a standard edge lift, but a flatter or steeper edge lift can be ordered. The proper edge lift will show at least .5mm of fluoroscein in the periphery of the lens. If the base curve looks good but the periphery looks tight or is biting down, order a flatter edge lift. If the periphery has excess edge lift or a bubble on the edge, order a steeper edge lift.
Acceptable Fit With Fluoroscein
A properly fit lens should move on the cornea and routinely exhibits a fluoroscein pattern with minimal apical clearance or a mild Three Point Touch rule. Caution should be taken not to have a lens that shows 360 degrees of bearing. This will cause seal off and result in a lens that fits too tight. The lens may lightly touch centrally. If your trial lens shows central touch with 360 degrees of seal off order a lens with a flatter edge lift or fit the same lens in a smaller diameter. If your trial lens shows heavy bearing go to a steeper lens; if it shows heavy central pooling go flatter.
Power Determination
The power of the lens should be determined by over refracting a properly fit VIP Cone Trial lens.
Corneal Toricity Base Curve Selection
0 to 1.75 2.50 Diop steeper than Flat K
1.87 to 3.00 3.00 Diop steeper than Flat K
Diameter Selection
Flat K > 41.50 9.4 Diameter
41.62 to 44.00 9.2 Diameter
44.12 to 48.00 9.0 Diameter
48.12 < 8.8 Diameter
Power Selection
Always convert the RX to minus cylinder form
Use 13 Vertex for powers > 4 diopters
Add the amount of BC steeper than K less .12 to the vertexed power in minus power. (Steeper than K add Minus)
This lens works best for Presbyopic Patients with up to +2.50 Add. This lens will work for the following patients:
Established GP Wearers Wearing Distance or Monovision
Soft Lens Failures/Contact Lens Drop Outs
Astigmatic Patients
New Wearers
Varifocal Products are aspheric simultaneous multifocal designs. These designs feature a variable eccentricity aspheric back surface with a spherical front surface. The center of the lens is the distance zone fit steeper than flat K and outside this zone the lens progressively flattens producing eccentricity or the add effect to accommodate for mid-range and near vision. A properly fit lens should exhibit a fluoroscein pattern of central apical clearance with an aligned mid peripheral and normal edge lift.
Patient Selection
The PK Lens is indicated for irregular corneas due to post surgical conditions; i.e. RK, PRK, LASIK, PKP. All of these procedures render a commonality of a plateau shaped cornea.
Pre-Fitting Information
A current Topographical map and best visual acuity Rx is suggested. Pre-surgical keratometry information if available may be useful in initial Fitting Curve selection. Note the cornea limbal diameter and any corneal pathology
Fitting Curve Selection
The fitting relationship of the PK Lens is primarily a function of the Mid-Peripheral Alignment Curve (MPAC). Note: This diagnostic PK Lens set incorporates a standard MPAC four diopters steeper than the central base curve (BC) radius. A flatter or steeper MPAC in relationship to the BC radius may be ordered as needed.
Select a MPAC closest to the average temporal peripheral radius 3-4 mm from the central cornea. The BC needs to be .50 to 1.00 diopter steeper than average central radius as a good rule-of-thumb.
Lens Power Calculation
After best fitting trial lens has been determined and noted, perform a spherical over-refraction (O/R. A Sphero-cylindercal O/R should only be performed when acceptable vision for the patient is not obtained.
The Acceptable Fit
The PK Lens should exhibit movement with the blink. One millimeter of movement is ideal. Less movement is acceptable if tear exchange can be identified. An acceptable fit is determined by lens centration, movement and adequate patient vision. Lens bearing may be present centrally or throughout the mid-periphery and is acceptable if tear exchange is present.
Fitting Guide for Naturalens Prog.pdf
The Best Decision You Will Make for Your Patients
10.8 fitting guide.pdf
Naturalens Fitting Guide.pdf
The All NEW PediaSITE is the perfect solution for your Pediatric Patients!
~ Approximately 133 Million babies are born worldwide each year.
~ Congenital Cateracts left unattended results in the loss of ability to develop functional vision
~ PediaSITE offers a safe, healthy alternative in natural visual development
~ The PediaSITE fitting system has been developed to simplify the fitting process for these children
PediaSITE about.pdf
PediaSITE fitting guide.pdf
Patient Selection:
The AVT Scleral is indicated for highly irregular corneas due to Keratoconus, Pellucid Marginal Degeneration, post surgical conditions; i.e. RK, PRK, LASIK, & PKP, Dry eye symptoms, and for Patients who suffer from awareness issues of other CL modalities.
scleral guide.pdf
scleral guide2.pdf
Cosmetic Prosthetic Cantor.pdf
alden 2010 specialty and prosthetic.pdf
The GP Lens Institutes patient information website has been re-launched with new articles about presbyopia, orthokeratology , keratoconus, astigmatism and contact lens prescriptions . The site can also help consumers to find an eye doctor who prescribes GP lenses.
For consumer information beyond contact lenses , this site covers eyeglasses and Lasik surgery in addition to a full range of eye conditions and diseases such as cataracts , macular degeneration and pink eye .
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