**All prism diopters in stock. Same day shipping.**
**New customers welcome **
Diplopia (3rd, 4th and 6th nerve palsies, following cataract surgery, myasthenia gravis, MS Graves Disease).
Phorias (symptomatic or decompensated phorias).
Prisms are used for patients that are bed-ridden, are Diabetes mellitus, post cataract surgery and low vision. Used as a fusion stimulus in other muscle deficiencies.
Ultra-thin 3M Press-On Optics - prisms and spheres - measure only 1mm thick.
Prisms may be cut to fit most frame sizes and shapes and adhere to existing lenses with only water. Aspheric Lenses – plus and minus and as D- segments.
in learning if a Fresnel Prism could help you or someone you know?
Please schedule an appointment with an eye professional near you as they
are best trained in the use and application of a prism.
Call for pricing / AVAILABLE PRISM AND ASPHERIC LENSES-download list
Aspheric Lenses allow for corrected vision while under water
Although similar to your glasses prescription, swim goggle diopter lenses require a quick calculation to ensure that the proper strength is selected and post-swim headaches are avoided. Looking at your prescription, you'll want to locate the sphere and cylinder for each eye. Use the following formula to find the right diopter lens for you:
(1/2)(Cylinder) + Sphere = Diopter
Remember: Water will refract light and correct vision a bit without any prescriptive power applied. With that in mind, always select a diopter strength that is one step lower than the outcome of your calculation. - or open file to use formula to determine the correct lens strength .
D-Seg Bifocal Lenses are great to use to alter sunglasses or in swim goggles & dive masks to add magnification to allow easy reading of gauges, watch or a camera. Available to all, no RX needed - call 1-800-544-4760. Note: RX is needed for prisms to the General Public. To determine correct power of lens when used in water open file - water will magnify images underwater.
Click here to download free adobe reader
PRISM / ASPHERIC LENS APPLICATION INSTRUCTIONS - download D-SEG APPLICATION AND CLEANING INSTRUCTIONS - download
Helpful Hint: Always apply the Prism to the inner surface of the carrier lens - this will ensure the prism will adhere.
Link to Nomograph / Rotation Guide kit Nomograph download is no longer available for free download
AVAILABLE PRISM AND ASPHERIC LENSES-download list
IMPORTANT - PRISMS ARE AVAILABLE TO EYE CARE PROVIDERS & HEALTHCARE CENTERS
Do not remove Press-On from spectacle lenses for cleaning
Rinse spectacle lenses under gentle stream of warm water
If contaminants remain after rinsing, use cleaning cloth or soft brush to clean grooves
Pat or blot dry with soft, lint free cloth
Alcohol is not recommended - this may make the Press-On appear cloudy
Use of an alcohol free lens cleaner may be required for stubborn staining
IF YOU WOULD LIKE TO ORDER A PRISM FOR PERSONAL USE - WE ARE REQUIRED TO HAVE A COPY OF YOUR PRESCRIPTION FROM YOUR EYE CARE PROVIDER. NO EXCEPTIONS.
PLEASE CALL US DIRECTLY 952-496-0432 OR 1-800-544-4760
*Please contact us directly to purchase
1-800-544-4760 US & Canada
1-952-496-0432 All Others
Fresnel Optic Cleaning Kit
The secret is the cloth, a lint-free micro fiber cloth that can reach into the small deep grooves of a Press-On®.
RETURN MERCHANDISE AUTHORIZATION (RMA)
All returns must be authorized by The Fresnel Prism and Lens Co. prior to
returning - please contact us at 1-800-544-4760 to receive a RMA number
which must be noted on a copy of the invoice for the merchandise being
returned. RMA’s are valid for 30 days from date of issue. Unauthorized
returns will be refused and returned.
3M Press-On Optics have expiration dates clearly noted on the back of the
sleeve, these dates are 3 years from the date of manufacture and as such
stock rotation and appropriate ordering of the Optics is imperative to
prevent “old” stock from being used with patients. 3M will only honor and
replace defective Press-On Optics within the expiration period. Due to this
policy, we are not able to accept or replace expired 3M Press-On Optics
even if they are noted as becoming “unusable”.