Coloured halos are seen in all, EXCEPT

C i.e. Tetracycline Glucomas Q -Primary angle closure glucoma (due to corneal edema & stretching Q) - Open angle glucomaQ Acute mucopurulent conjunctivitis Q (due to mucus) Corneal scar Krukenberg spindle (Pigmentary glucoma)Q Cataract Q (lens opacity) Vitreous opacities - e.g. haemorrhage, asteroid bodies, synchysis scintillans etc. Any haze of ocular media Q Contact lens overwear (due to corneal abrasion) Too intense exposure to light as in snow blindness Asymmetrical placement of intraocular lens in relation to pupillary apeure Drugs - acetophenazine, acetyldigitoxin, amiodarone, amodiaquine, amyl nitrite, butaperazine, carphenazine, chloroquine, chlorine dioxide, chlorpromazine, coisone, deslanoside, dexamethasone, diethazine, digitalis, digitoxin, digoxin, ethopropazine, ethylene diamine, fluorometholone, fluphenazine, gitalin, hydrocoisone, hydroxychloroquine, lanatoside C, medrysone, mesoridazine, methidilazine, methotrimeprazine, methylprednisolone, nitroglycerin, nitronaphalene, oral contraceptives, ouabain, paramethadione, perazine, pericyazine, promazine, promethazine, propiamazine, quinacrine, thiethylperazine, thiopropazine, thioproperazine, thioridazine, trifluoperazine, triflupromazine, trimeprazine, trimethadione and sterile water. * Tetracycline is not included in this long drug list & haze in ocular media can occur in acute anterior uveitis due to aqueous flare & K.P's.