Symptom | Possible eye problem or disease |
Red or pink eye | allergy, blepharoconjunctivitis, canaliculitis, cavernous sinus problem, computer vision syndrome, conjunctivitis, contact lens problem, corneal abrasion, corneal ulcer, dacryocystitis, dry eye syndrome, ectropion, endophthalmitis, entropion, episcleritis, eye tumor, foreign body, fungal keratitis eye infection, glaucoma, Graves' ophthalmology, meibomianitis, pterygium, scleritis, subconjunctival hemorrhage, surgery, uveitis, vascular problem |
Red or pink eyelid | blepharitis, blepharoconjunctivitis, contact lens problem, dacryoadenitis, ectropion, lupus erythematosus, meibomianitis, orbital cellulitis, stye, vascular birthmark. See also: spot on eyelid, colored (below) |
Shadow in vision | macular degeneration, retinal detachment. See also: floater in vision (above) |
Shadow on letters | astigmatism, macular degeneration. See also: double vision (above) |
Small appearance of objects that are actually larger | metamorphopsia |
Small eye | enophthalmos, microphthalmia, ptosis. See also: bulging eye (above) |
Spasm | See: eye twitching (above) |
Speck in vision | See: floater in vision (above) |
Spot in vision | cataract. See also: floater in vision, vision loss |
Spot on eye, brown | melanosis, nevus, skin cancer |
Spot on eye, red or pink | See: red or pink eye (above) |
Spot on eye, white or cloudy | cataract, corneal edema, corneal opacity, corneal ulcer, eye tumor (intraocular), leukocoria, pinguecula, pterygium. See also: white ring/bow around iris (below) |
Spot on eye, yellow | pinguecula. See also: yellow eyes |
Spot on eyelid, colored | eye tumor, liver spot, lupus erythematosus, melanosis, nevus, papilloma, pediculosis, skin cancer, xanthelasma. See also: red or pink eyelid (above) |
Squiggle in vision | metamorphopsia. See also: floater in vision (above) |
Squinting | accommodation disorder, amblyopia, hyperopia, myopia, photophobia, presbyopia, uveitis, vergence disorder. See also: light sensitivity (above) |
Sticky eyes | allergy, blepharitis, blepharoconjunctivitis, conjunctivitis, dacryocystitis, dacryostenosis |
Straight lines appear wavy, curved or bent | metamorphopsia |
Swelling, around eyes | dacryoadenitis, dacryocystitis, eye tumor, orbital cellulitis, sinusitis, trauma |
Swelling, eye | chemosis, fungal keratitis eye infection, trauma |
Swelling, eyelid | allergy, blepharitis, canaliculitis, chalazion, contact lens problem, dacryoadenitis, eye tumor, meibomianitis, orbital cellulitis, sinusitis, stye, trauma, vascular problem |