Eye

Function

The cornea and lens focus light on the retina, which turns it into signals the optic nerve sends to the brain.

Includes

Cornea, iris, pupil, lens, retina and optic nerve.¹

A short overview linking this part to related content.

Conditions that affect it

• Type 2 diabetesCondition
• Diabetic retinopathyCondition
• Allergic rhinitis (hay fever)Condition

Specialty

• OphthalmologySpecialty

Related to

• Induced pluripotent stem cellsFuture path

References

1. 1
   NEI / NIH. How the Eyes Work. www.nei.nih.gov/learn-about-eye-health/healthy-vision/how-eyes-work
   Health agencies & guidelines · Accessed 2026-10-03