<prompt> False regarding Mercuria lentis:Brownish deposit of mercury on anterior lens capsuleSlit lamp examination shows malt brown reflexDue to the exposure of mercurial vapoursIt is bilateral affects the visual acuity  <response>: Mercuria lentis is a feature of hydrargyrism also known as chronic mercury poisoning. Some other features are :- 1. Tremor- hatters shakes glass blower shakes Danbury tremor 2. Acrodynia pinks disease 3. Mercurilentis is due to exposure of mercurial vapours in which vapours deposits over anterior lens capsule . On slit lamp examination malt brown reflex is seen. It is bilateral and it doesnt affects the vision. 4.Mercurial erethism- mad hatter 5.Minamata disease due to consumption of fish containing methyl mercury. 