logo-eyezen logo-eyezen logo-varilux-white logo-xperio-uv
Skip to main content

THE HUMAN EYE IS AN AMAZING ORGAN

THE WONDER OF SIGHT AND HOW IT WORKS

The human eye is composed of many parts, all of which work together to convert the light rays that are going through your pupil into information your brain can interpret.

Three things happen when you look at something:

  1. Light enters your eye through your pupil.
  2. The cornea and crystalline lens work together to focus the light onto the retina.
  3. The energy from the light is transferred to your brain and decoded into an image.

LIGHT PERCEPTION

Light rays travel and bounce off objects before they get to your pupil, and determine the color and brightness your brain perceives. Thanks to this complicated process, we perceive the thin band of the electromagnetic spectrum called visible light that enables us to be aware of what surrounds us.

VISUAL ACUITY

Visual acuity refers to the sharpness of one's vision; it is a measure of how well a person sees. The Snellen chart test is commonly used to measure acuity.

This test determines how much detail a person can distinguish on a standardized chart of letters when standing 20 feet away. Someone with 20/20 vision can resolve the same degree of detail at 20 feet that a standard observer can resolve at 20 feet. 20/20 does not mean perfect vision, as it is quite possible to see better than 20/20. The smaller the bottom number in the visual acuity ratio, the better the acuity.

Personalize Your Lenses

Discover a customized solution for your lifestyle.

The Ultimate Lens Package

Combine three innovative technologies for our ultimate in vision, clarity, and protection.
Progressive lenses that provide sharp vision and smooth transitions at any distance.

WANT TO BUY ESSILOR LENSES?

Find an eyecare professional. Enter your ZIP code below to find a location near you.