Trichomegaly is a condition characterised by presence of long eye lashes. It could be congenital. Genetically some people have long lashes.

Also, some female film actors put an extra row of eye lashes to look beautiful. Other causes of Trichomegaly are:  HIV Renal Cell Carcinoma drugs prostaglandin analogues cyclosporine phenotypes chelating agents systemic steriods streptomycine