Ocular Anatomy and Physiology Flashcards
7 cards from real ABO NOCE Basic Opticianry practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Ocular Anatomy and Physiology flashcards as text
Which layer of the retina contains the photoreceptor cells (rods and cones)?
Answer: Outer nuclear layer
The outer nuclear layer contains the cell bodies of the photoreceptor cells, including rods and cones.
The aqueous humor is produced by which ocular structure?
Answer: Ciliary body
The ciliary body produces aqueous humor, which flows from the posterior chamber through the pupil into the anterior chamber.
What is the approximate axial length of the average adult human eye?
Answer: 24 mm
The average adult eye has an axial length of approximately 24 mm from the anterior corneal surface to the retina.
Which cells in the retina are responsible for color vision?
Answer: Cones
Cone photoreceptors, concentrated in the fovea, are responsible for color vision and fine detail under photopic (bright light) conditions.
The ora serrata marks the junction between which two ocular structures?
Answer: Retina and pars plana
The ora serrata is the serrated anterior boundary of the retina where it meets the pars plana of the ciliary body.
Which cranial nerve is responsible for carrying visual information from the retina to the brain?
Answer: Cranial nerve II
Cranial nerve II (the optic nerve) carries visual information from the retinal ganglion cells to the lateral geniculate nucleus and visual cortex.
What structure regulates the amount of light entering the eye?
Answer: Iris
The iris, with its sphincter and dilator muscles, regulates pupil size to control the amount of light reaching the retina.