A patient presents with h/o evening halos and occasional headache for some months. His examination shows normal IOP but shallow AC. He is in which stage of glaucoma?: (A) Acute, (B) Absolute, (C) Prodrome, (D) Constant instability
Answer is C. Five clinical stages are discernable in primary angle closure glaucoma (PACG): Prodromal stage: Patient sees coloured haloes due to high intraocular pressure (IOP) with some obscuration of vision Chronic instability stage: The intermittency of the prodromal stage is replaced by the regularity of attacks. Acute ACG stage: Acute attacks glaucoma Chronic ACG stage: The recurrent attacks of angle closure eventually lead to peripheral anterior synechiae that may permanently block the exit pathways Absolute glaucoma: It is the end result of untreated attacks ACG or chronic ACG. It results in a stony hard, painful, blind eye. Ref: Concise Textbook Of Ophthalmology By Sharma, 2006, Page 118.