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What is A patient presents to the emergency depament with uniocular diplopia. Examination iwth oblique illunination shows golden crescent while examination with co-axial illumination show a dark crescent line. Which of the following is the most likely diagnosis - and explain in detail?
Presence of uniocular diplopia together with finding of golden crescent on oblique illumination (edge of subluxated lens) or black crecent line on coaxial illumination (edge of subluxated lens) suggests a diagnosis of 'subluxation' of the crystalline lens. Ectopic lentis refers to displacement of lens from its normal position (subluxation, dislocation). (Ref: Ophthalmology by khurana 7th/e p.222 & (2005)/e p.24; Clinical Examination in by Mukherjee 2006/e p.166; Neema 6th/e p.285, 286)