Eyelid is a thin skin fold protecting the eye. Levator palpebrae superioris muscle retracts eyelid for vision. Regular tear distribution keeps cornea moist. Eyelashes protect eye from dust and debris
Glasses are vision eyewear with lenses mounted in frames for correction or protection. Safety glasses protect against flying debris and hazardous substances. Sunglasses provide protection against UV light and glare. Corrective lenses correct refractive errors like myopia and presbyopia. 3D glasses create illusion of three dimensions using different filters
Albinism is a congenital condition characterized by complete or partial absence of pigment. Two main types: oculocutaneous affecting eyes, skin and hair, and ocular affecting only eyes. Worldwide prevalence is approximately one in 17,000 people
Dark ring forms around iris where sclera meets cornea. Appearance varies with pupil dilation, narrowing with larger pupils. Some contact lenses are colored to simulate limbal rings
Eye color is determined by pigmentation and light scattering in iris stroma. As of 2010, 16 genes have been associated with eye color inheritance. Blue eyes are highly sexually dimorphic, with men more likely to have them
One small tomato contains 16 calories, 3.5g carbs, and 0.8g protein. Rich in vitamin C, K, potassium, and various forms of vitamin A. Contains lycopene, which may reduce prostate cancer risk