Blue Light Lens icon Extended Vision Lens icon Large Reading Area icon Near To Far icon Sharp Vision icon Wide Field Of Vision icon Crizal Crizal Eyezen Eyezen EyeZen™+ Defend Against Digital Eye Strain. Enhanced Single Vision Lens, Reduces Eye Strain, Helps Protect from Harmful Blue Light. EyeZen™+ Défendez-vous contre la fatigue oculaire numérique. Lentille à vision unique améliorée, réduit la fatigue oculaire, aide à protéger de la lumière bleue nocive. Crizal Crizal® Anti-glare coating gives you the clearest vision possible with glare, scratch, and smudge protection. Essilor-Logo Eyezen Eyezen Transitions_Signature_GEN8_4c Transitions™ Adaptive lenses adjust to changing light, keep you comfortable and protected in all conditions. Varilux Varilux® Sharp Vision AT ANY DISTANCE. Icons—Sharp Vision, Near to Far, Eliminates Off-Balance. Experio UV logo-xperio-uv Xperio UV Experio UV Single Vision Single Vision Transitions Transitions UV Protection UV Protection Varilux Varilux Xperio™ Polarized lenses provide maximum protection for the best vision under the sun. Xperio UV Xperio UV
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THE HUMAN EYE IS AN AMAZING ORGAN

parts of the human eye: Retina, Choroid, Sclera, Iris, Lens, Pupil, Anterior chamber, Cornea, Vitreous humor, Inferior rectus muscle, Optic nerve, Superior rectus muscle

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.

eye exam board: P E C D
eye exam tool. RL RMH RMV P U PH

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.

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CLOSER LOOK

Examine the details that go into each type of Essilor lens.
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THE SCIENCE BEHIND
THE LENSES

See what makes Essilor the leader in lens innovation.
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