Ophthalmic Assistant

Category - Patient Services and Education

How many layers compose the tear film?
  1. 2
  2. 4
  3. 3
  4. 6
Explanation
Answer: C - 3

The tear film is composed of three layers. The outermost layer is made up of lipids, the central layer is mostly aqueous, and the innermost layer is very thin and made of mucus.
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