polarized lenses

Polarized Lenses are very useful under intense light, but also in specific atmospheric conditions which alter the perception of contrast (mist, fog, rain, smoke and smog).

PATIENT PROFILE

• While driving:
  Eliminating the reflections from the dash board, the road surface, other cars.
• Outdoor activities:
  Eliminating of reflected glare produced by flat surfaces:
  • snow
  • ice
  • lake
  • sea
  • specific atmospheric conditions: rain, mist, fog
• Photosensitive eyes:
  Mostly elderly people who are more sensitive to glare and reflections.
• Patients who have just undergone eye surgery.
• Contact lens wearers: Although contact lenses with UV or sun filters do exist, only polarizing lenses are able to block out blinding reflections.

PATIENT BENEFITS
These lenses offer better visual comfort, increased visual clarity and excellent protection against harmful UV radiation.

Improving perception of colors and shapes
They reduce eye strain whilst improving the perception of colors and contrast. A simple reduction in the intensity of visible light, offered by tinted and photochromic glasses can be not sufficient. Polarized lenses enhance visual performance by increasing visual acuity and improving color contrast. Reduction of glare causes objects to become more distinct and colors more vibrant.

Protecting the eyes against UV
Protecting the eyes against ultraviolet radiation is essential. It increases visual comfort and can prevent numerous eye pathologies, rapid ageing of the crystalline, cataract, snow blindness, etc… There are several ways to prevent harmful radiation from the sun:

• Tinted lenses
• Clip-on sunglasses
• Photochromic lenses
• Sun contact lenses
• Appropriate UV treatments

However, only polarized sunglasses offer an ultimate protection. They provide superior protection for the eye against harmful UV light. Certain polarized colors also reduce high-energy visible (HEV) light, which can cause damage to the retina.

Protecting the eyes against malicious sun reflections
In addition to 100% absorption of harmful UV rays, they also protect the eyes from glare (sun light reflecting). Light is reflected at all types of surfaces. The clearer and more reflective the surface, the more reflected glare becomes harmful for vision. Glare produced by reflections on snow, water, sand, ice, vehicles and road surfaces causes a drop in visual acuity.

TECHNOLOGY
A polarized lens has a polarized film that is cast into a lens to filter out unwanted light. Light normally travels in many different directions. When light hits a reflective surface like water, snow and sand, it becomes concentrated in one direction, resulting in reflected glare. The principle of a polarized lens is best illustrated by observing the use of Venetian blinds. The blind blocks light at certain angles, while allowing light to transmit through select angles. True polarization is achieved by shutting out 100% of undesirable light and allowing 100% of desired light through.