The Eyes Have It Multiple Choice Quiz | 10 Questions

Answer: Glaucoma

The optic nerve is a cable made up of 1 million separate fibers. Glaucoma is a disease that causes damage to the optic nerve with abnormally high intraocular pressures. The most common type of glaucoma is called chronic open angle and is treated most commonly with drops. The second most common type is narrow angle glaucoma and is most commonly treated by laser iridotomy.

Answer: Melanin

Lighter skinned populations have less pigment and therefore are more likely to have blue eyes while darker pigmented populations are more likely to have dark brown irises. It is interesting that the pupils of darker pigmented populations take longer to dilate than those of fair skinned people.

Answer: Your eyes are bulging

The most common cause is hyperthyroidism. The excess thyroid hormone stimulates the sympathetic nervous system and causes a widening of the lid fissures. Orbital tumors can also be a cause pushing the eyeball forward from the orbital space.

Answer: Six

There are four recti muscles. Inferior, superior, lateral and medial in each eye. These four muscles control horizontal, up and downward gaze. There are two oblique muscles in each eye and they control torsional movement of the eyes.

Answer: Cornea

Corneal transplantation is the most successful of all the organ transplant procedures. The typical need in organ transplantation for ABO blood type compatibility is not a factor in the transplantation of the cornea because no blood vessels are involved.

Answer: A clouding of the crystalline lens of the eye

Cataract surgery is the most common surgery performed in the USA (over 3 million/year). It is the most common cause of curable blindness in the world.

Answer: Retinoscope

The motion of a streak of light from the retinoscope reflecting off the red reflex of the retina through a trial lens is used objectively to determine the approximate power of the correction needed for distance vision. The phoropter then subjectively fine tunes the prescription for the spectacles.

Answer: Cornea and lens

The cornea controls 2/3 of the focusing power and the lens 1/3. The lens can change its power by accommodating (changing its shape). The cornea's power is static.

Answer: it looks like a grape

When early Greek anatomists dissected the white sclera free from the internal blood supply it appeared grapelike. The Greek word for grape is uvea. The uvea is made up of the iris, ciliary body and choroid, all very vascular.

Answer: Cataract

Dr. Charles Kelman introduced phacoemulsification in 1967. An ultrasound vibrating tip emulsifies the cataract and aspirates the emulsification through a tiny incision. This innovation reduces risk and discomfort as well as speed of recovery in cataract surgery. Phaco is the Greek word for bean. A cataract looked like a bean to the dissectionists of ancient Greece.