Differential Diagnosis in Primary Eye Care

SYMPTOMS: Blurred vision; Sudden vision loss; Visual field defects; Non-physiologic vision loss; Color vision anomalies; Poor night vision (nyctalopia); Flashes and/or Floaters; Diplopia; Lid twitch; Itch; Eye pain; Photophobia; Headache; SIGNS: Acute red eye; Acute conjunctival inflammation; Conjunctivitis in neonates; Lesions of the conjunctiva; Punctate keratopathy; Corneal filaments; Infectious corneal disease; Corneal edema; Interstitial keratitis; Corneal neovascularization; Corneal pigmentation; Corneal opacification; Corneal thinning; Anomalies of corneal size and curvature; Lacrimal system disorders; Lid inflammation; Diffuse eyelid swelling; Lid lesions; Anomalies of lid position; Injection of the sclera or episclera; Lesions of the iris; Acute iritis/iridocyclitis; Debris in the anterior chamber; Increased intraocular pressure; Decreased Intraocular Pressure (Hypotony); Opacities of the Lens; Anomalies of lens position; Leukocoria (white pupil); Vitreous opacities; Posterior segment hemorrhages; Macular edema; Non-hemorrhagic retinal vascular anomalies; Yellow or White fundus lesions; Black or gray fundus lesions; Lesions of the peripheral retina; Anomalies of optic disc color; Anomalies of optic disc contour and position; Vascular anomalies of the disc; Anomalies of globe size; Anomalies of globe position; Esodeviation; Exodeviation; Extraocular muscle paresis; Nystagmus; Anisocoria