S. N | Ocular condition | Differentiating feature | Investigation required |
1 | Uveitis | Engorged iris blood vessels, KP, AC cells | Slit lamp, uveitis workup, blood test |
2 | Acute attack of angle closure glaucoma | Shallow AC, Corneal edema but no Neovascularization on iris | Slit lamp, gonioscopy, AS-OCT, fundus, fellow eye examination |
3 | Intraocular tumors | Neovascularization on iris and in angle | ± Slit lamp, fundus examination, B scan, ancillary imaging for Metastasis |
4 | Carotid-cavernous fistula | Blood in Schlemm’s canal | Gonioscopy, imaging studies of brain |
5 | Long standing Retinal detachment | PVR changes and neovascularization, post R.D surgery—signs of ischemia in anterior segment | Slit lamp, fundus, B scan |
6 | Anterior segment dysgenesis | Corectopia, iris atrophy with prominent blood vessels | Slit lamp, B scan |