1. Retina, Vitreous, Choroid
1.1. Retinal Vascular
1.1.1. diabetic
1.1.1.1. Diabetic Retinopathy
1.1.2. cottonwool spots
1.1.2.1. Central Retinal Vein Occlusion
1.1.3. cherry red spot
1.1.3.1. Central Retinal Artery Occlusion
1.2. Maculopathies
1.2.1. gradual painless loss of vision
1.2.1.1. Non-neovascular ARMD
1.2.2. blurry vision, metamorphopsia, scotoma
1.2.2.1. Neovascular ARMD
1.3. Heredodegenerative
1.3.1. nyctalopia
1.3.1.1. Retinitis Pigmentosa
1.4. Tumors
1.4.1. Metastatic
1.4.2. reddish orange tumor
1.4.2.1. Choroidal Capillary Hemangiomas
1.5. Retinal Detachments
1.5.1. retinal break
1.5.1.1. "curtain falling"
1.5.1.1.1. Rhegmatogenous
1.5.2. (-) retinal break
1.5.2.1. Non-rhegmatogenous
1.6. Vitreous Opacities and Degeneration
1.6.1. floaters with decreasing vision
1.6.1.1. (-) trauma
1.6.1.1.1. Vitreous Hemorrhage
1.7. Retinochoroiditis
1.7.1. retinal and choroid scarring
1.7.1.1. Toxoplasmosis
1.8. Uveal Effusion
1.8.1. sudden BOV
1.8.1.1. vitiligo + poliosis
1.8.1.1.1. Vogt-Koyanagi-Harada Syndrome
1.9. Infectious Retinopathies
1.9.1. fleeting cottonwool spots
1.9.1.1. HIV Retinopathy
2. Optic Nerve
2.1. increased ICP
2.1.1. Papilledema
2.2. severe loss of vision with eye pain
2.2.1. central visual field loss
2.2.1.1. Optic Neuritis
2.2.1.1.1. anterior to optic disc
2.2.1.1.2. behind the eyeball
2.2.1.1.3. adjacent retina
2.3. sudden, painless, non-progressive BOV
2.3.1. Anterior Ischemic Optic Neuropathy
2.4. Ethambutol
2.4.1. Toxic Optic Neuropathy
2.5. optic disc pallor
2.5.1. Optic Atrophy
2.6. Developmental Anomalies
3. Refraction
3.1. Emmetropia
3.2. Ammetropia
3.2.1. distant objects blurred
3.2.1.1. Myopia
3.2.2. near objects blurred
3.2.2.1. Hyperopia
3.2.3. blurring at all distances
3.2.3.1. Astigmatism
3.2.4. blurring of vision
3.2.4.1. 40+ y/o
3.2.4.1.1. Presbyopia
4. Cornea
4.1. (+) opacity
4.1.1. Corneal Scar
4.1.1.1. (+) eye redness, tearing, photophobia
4.1.1.1.1. Microbial Keratitis
4.1.1.2. injury
4.1.1.2.1. Corneal Trauma
4.1.1.3. lagophthalmos
4.1.1.3.1. Exposure Keratopathy
4.1.1.4. eyelash misdirection
4.1.1.4.1. Trichiasis
4.1.1.4.2. Trachoma
4.1.1.4.3. Chronic Blepharitis
4.1.1.4.4. Ebiblepharon
4.1.1.4.5. Entropion
4.1.1.5. congenital
4.1.1.5.1. Peter's Anomaly
4.1.2. Corneal Edema
4.1.2.1. Endothelial Dystrophy
4.1.2.2. post-surgery
4.1.2.2.1. Surgical Trauma
4.1.2.3. increased IOP
4.1.2.3.1. Glaucoma
4.1.3. Corneal Deposits
4.1.3.1. hereditary
4.1.3.1.1. Corneal Dystrophy
4.1.3.2. yellow/cream-colored
4.1.3.2.1. Lipid Keratopathy
4.1.3.3. swiss cheese
4.1.3.3.1. Calcific Band Keratopathy
4.1.3.4. central golden brown to yellow discoid
4.1.3.4.1. Corneal Staining
4.1.3.5. Metabolic Disorders
4.1.4. Corneal Melt
4.1.4.1. malnourished
4.1.4.1.1. Vitamin A Deficiency
4.1.4.2. Alkali Chemical Burn
4.1.5. Corneal Tumors
4.1.5.1. congenital
4.1.5.1.1. Dermoid Choristoma
4.1.5.2. Corneal Intraepithelial Neoplasia
4.1.5.3. UV exposure
4.1.5.3.1. Pterygium
4.2. (-) opacity
4.2.1. Epithelium and Tear Film
4.2.1.1. tear volume
4.2.1.1.1. Dry Eye Syndrome
4.2.1.2. fluctuating vision
4.2.1.2.1. Tear Quality Abnormality
4.2.1.3. chemical contact
4.2.1.3.1. superficial punctate lesion
4.2.2. Size, Shape, Curvature
4.2.2.1. rapidly progressing BOV which stabilizes later on
4.2.2.1.1. Keratoconus
4.2.2.2. peripheral scar
4.2.2.2.1. Corneal Distortion
5. Lens
5.1. Congenital
5.1.1. Idiopathic
5.1.2. Hereditary
5.1.3. oil droplet appearance
5.1.3.1. Galactosemia
5.1.4. Prenatal Exposure
5.1.5. Maternal Malnutrition
5.2. Acquired
5.2.1. Senile
5.2.1.1. urochrome pigments
5.2.1.1.1. Nuclear Cataract
5.2.1.2. periphery
5.2.1.2.1. Cortical Cataract
5.2.1.3. Subcapsular
5.2.1.3.1. white
5.2.1.3.2. not white
5.2.2. Traumatic
5.2.3. Diabetic
5.2.3.1. Metabolic
5.2.4. Drug-induced
5.2.5. Secondary