Certified Ophthalmic Assistant Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the Certified Ophthalmic Assistant Exam. Access multiple choice questions that reflect actual exam content and receive hints and explanations for each question. Prepare effectively and embark on your path to certification!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What value is used to denote the permeability of a contact lens?

DK
Dk/t
BA
PMMA

The correct answer is: DK

The correct answer is the value denoted as Dk/t. This value represents the permeability of a contact lens, which is a crucial factor in determining how much oxygen can pass through the lens to reach the cornea. Dk specifically refers to the oxygen permeability of the lens material itself, while the "t" represents the thickness of the lens. This combination allows for the assessment of how effectively a lens allows oxygen to flow, which is vital for maintaining corneal health and comfort for the wearer. Other values mentioned, such as DK (which is just the permeability factor without taking thickness into account), BA (which does not relate to oxygen permeability), and PMMA (a type of material used in some lenses known for its rigidity and lack of permeability) do not provide a comprehensive measure of how well oxygen can pass through a contact lens.