ABO Certification questions with correct answers

What are the three layers of the eye? - Answer Fibrous tunic, vascular tunic, and nervous tunic What are the five layers of the cornea from anterior to posterior? - Answer Epthelium, Bowmans Membrane, Stroma, Descemets Membrane, Endothelium What controls the amount of light entering the eye? - Answer Iris How many rods and cones are in the eye? - Answer About 120 million rods and 6 million cones What is the name for the refractive condition where light comes in to focus directly on the retina? - Answer Emmetropia What is the name for the refractive condition where light comes in to focus behind the retina? - Answer Hyperopia or far-sightedness What is the name for the refractive condition where light comes in to focus in front of the retina? - Answer Myopia or near-sightedness What is the name for the refractive condition where light comes to focus on two different points? - Answer Astigmatism (cylinder) The onset of presbiopia typically begins at what age? - Answer 40 The 6 extraocular muscles responsible for stabilization of the eye