Just another dumb question....ophthalm JRs?!

This may sound very dumb, But just curious

Question: Prior to any ophthalmic surgery, guidelines suggest not to trim the eyelashes [instead to put a clear plastic drape which is then cut and speculum is then inserted via the aperture in the drape].

This is how it's done in my college

But I've heard that in most places in India, in government set ups and govt medical colleges[even the famous ones], Eyelashes are trimmed?

How is it done? Is there risk of traumatic injury to eyelids? Increased risk of infection?

Could someone give some insight?