Vision function - Answers Converts light into electrical signals sent to the brain
Retina - Answers Converts light into nerve impulses
Optic nerve - Answers Cranial nerve II that transmits visual signals to brain
Rods - Answers Allow vision in dim light (black, white, gray)
Cones - Answers Responsible for color vision (red, green, blue)
Sclera - Answers Tough white outer layer of the eye
Uvea - Answers Middle layer containing iris, ciliary body, choroid
Cornea - Answers Clear front surface that bends light
Lens - Answers Focuses light onto the retina
Macula - Answers Central retina responsible for sharp vision
Fovea - Answers Point of sharpest vision
Optic disk - Answers Blind spot where optic nerve exits
Aqueous humor - Answers Clear fluid in front of eye maintaining pressure
Vitreous humor - Answers Jelly-like fluid in back of eye
Canal of Schlemm - Answers Drains aqueous humor
Pupil - Answers Opening that allows light into eye
Iris - Answers Colored part controlling pupil size
Miosis - Answers Pupil constriction
Mydriasis - Answers Pupil dilation
Accommodation - Answers Lens changes shape for near/far focus
Refraction - Answers Bending of light for image formation
Convergence - Answers Inward movement of eyes for near vision
Myopia - Answers Nearsightedness (blurred distance vision)
Hyperopia - Answers Farsightedness (blurred near vision)
Astigmatism - Answers Irregular cornea shape causing blurred vision
Presbyopia - Answers Loss of lens elasticity with aging
Normal vision (Snellen) - Answers 20/20 vision
Blindness - Answers 20/400 to no light perception
Legal blindness - Answers 20/200 or worse in better eye
Conjunctiva - Answers Membrane protecting and lubricating eye
Conjunctivitis - Answers Inflammation of conjunctiva (pink eye)
Eye assessment - Answers Check symmetry, vision, pupils, and movement
Exophthalmos - Answers Bulging eye
Enophthalmos - Answers Sunken eye
Ptosis - Answers Drooping eyelid
Tonometry - Answers Measures intraocular pressure (normal 10-21 mmHg)
Amsler grid - Answers Tests central vision (macula)
Perimetry - Answers Measures visual fields
Snellen chart - Answers Tests visual acuity
Cataracts - Answers Clouding of the lens causing blurred vision
Cataract symptoms - Answers Painless blurry vision, glare, cloudy lens
Cataract risk factors - Answers Aging, UV exposure, smoking, diabetes
Cataract treatment - Answers Surgical removal and lens replacement
Glaucoma - Answers Damage to optic nerve from increased IOP
Open-angle glaucoma - Answers Slow onset, peripheral vision loss
Angle-closure glaucoma - Answers Emergency, sudden severe eye pain
Glaucoma symptoms - Answers Halos, vision loss, eye pressure
Glaucoma treatment - Answers Eye drops, meds, surgery
Macular degeneration - Answers Loss of central vision
Dry macular degeneration - Answers Gradual central vision loss
Wet macular degeneration - Answers Rapid vision loss due to new vessels
Macular symptoms - Answers Blurred vision, difficulty recognizing faces
Retinal detachment - Answers Separation of retina from underlying tissue
Retinal symptoms - Answers Flashes, floaters, curtain over vision
Retinal emergency - Answers Requires immediate treatment