Multiple choice

Which of the following is an oily substance that prevents the drying up of eye's tear film?

  1. Sebum

  2. Elastin

  3. Meibum

  4. Aggrecan
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The meibomian glands or tarsal glands are a special kind of sebaceous gland at the rim of the eyelids inside the tarsal plate responsible for the supply of meibum, which is an oily substance that prevents evaporation of the eye's tear film. Meibum prevents tear spillage onto the cheek, trapping tears between the oiled edge and the eyeball, and makes the closed lids airtight.

Keep practicing — related questions