In older adults, the leading cause of new cases of vision loss is:

[Answer to ques. #1]  D
Explanation: D) Correct. Macular degeneration is the leading cause of vision loss in older adults.

[Answer to ques. #2]  D
Explanation: A) Macular degeneration is destruction of the macula.
B) Cataracts are cloudy lenses.
C) Glaucoma is increased intraocular pressure.
D) Correct.

[Answer to ques. #3]  C
Explanation: A) Rods are used for night vision, but they are not pigment.
B) Cones are sensitive to bright light and color vision.
C) Correct.
D) Fovea centralis is the central focusing point within the eye.

[Answer to ques. #4]  C
Explanation: A) The optic disk is where the optic nerve exits the eye.
B) The retina is the lining of the posterior eye.
C) Correct.
D) The ciliary body attaches the iris to the eye.

[Answer to ques. #5]  B
Explanation: A) The macula is a specialized area of the retina.
B) Correct.
C) Vitreous humor is a gel-like substance that fills the posterior portion of the eye.
D) The choroid is the middle layer of the eye.

[Answer to ques. #6]  A
Explanation: A) Correct.
B) The iris is the colored ring of the eye.
C) The uvea is the middle layer of tissue of the eyeball.
D) The pupil is the hole in the center of the iris.

[Answer to ques. #7]  D
Explanation: A) Vitreous humor is in the posterior portion of the eye.
B) Sebum is used to keep the eyelashes from sticking together.
C) The conjunctiva are the eyelid linings.
D) Correct.