What is the primary pathophysiology of glaucoma?

Blockage of the tear ducts causing excessive tearing.

Inflammation of the cornea resulting in blurry vision.

Increased intraocular pressure (IOP) leading to optic nerve damage.

Degeneration of the lens leading to cataracts.

Answer and Explanation

The Correct Answer is C

A) Blockage of the tear ducts causing excessive tearing:

Blockage of tear ducts (dacryostenosis) results in excessive tearing (epiphora) due to inadequate drainage of tears into the nasal cavity. It does not directly contribute to glaucoma, which primarily involves increased intraocular pressure (IOP) and optic nerve damage.

B) Inflammation of the cornea resulting in blurry vision:

Corneal inflammation (keratitis) can cause blurry vision, pain, and sensitivity to light, but it is not the primary pathophysiology of glaucoma. Glaucoma primarily involves damage to the optic nerve due to elevated IOP.

C) Increased intraocular pressure (IOP) leading to optic nerve damage:

Glaucoma is characterized by elevated IOP, which puts pressure on the optic nerve and can lead to progressive damage and vision loss if untreated. This is the primary pathophysiological process in most types of glaucoma.

D) Degeneration of the lens leading to cataracts:

Cataracts involve the clouding of the lens of the eye, leading to visual impairment. While cataracts are a common condition in older adults, they are not directly related to the pathophysiology of glaucoma, which primarily involves elevated IOP and optic nerve damage.

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Free Nursing Study Resources

Correct Answer is C

Explanation

A. Acanthosis Nigricans:

Acanthosis nigricans is characterized by dark, velvety patches of skin, often found in body folds such as the neck, armpits, and groin. It does not present as the yellow discoloration seen in the photo.

B. Cyanosis:

Cyanosis is a bluish discoloration of the skin and mucous membranes due to inadequate oxygenation of the blood. The image shows yellow discoloration, not the blue tint associated with cyanosis.

C. Jaundice:

Jaundice is indicated by a yellowish tint to the skin and sclera due to elevated bilirubin levels, commonly associated with liver dysfunction. The photo clearly shows this yellow discoloration, consistent with jaundice, often seen in chronic alcoholics with liver disease.

D. Carotenemia:

Carotenemia presents as a yellow-orange discoloration of the skin, especially on the palms and soles, due to high levels of carotene in the blood. It does not typically affect the sclera, which differentiates it from jaundice. The uniform yellowing of the skin and eyes in the photo aligns more with jaundice.

A. 20 represents the distance you are placed from the chart and 40 represents the distance a normal eye read the chart. B. 20 represents the distance a normal eye can read and 40 represents the distance your eye read the chart. C. 20 represents the distance you are placed from the chart and 40 represents the distance your eye read the chart. D. 40 represents the distance you are placed from the chart and 20 represents the distance a normal eye read the chart.

Correct Answer is A

Explanation

A. 20 represents the distance you are placed from the chart and 40 represents the distance a normal eye reads the chart:

This is correct. The first number (20) represents the distance in feet the patient is from the Snellen chart. The second number (40) indicates the distance at which a person with normal vision can read the same line. Therefore, 20/40 means that what the patient can read at 20 feet, a person with normal vision can read at 40 feet.

B. 20 represents the distance a normal eye can read and 40 represents the distance your eye reads the chart:

This is incorrect. The first number should represent the distance the patient is from the chart, not the normal eye's reading distance.

C. 20 represents the distance you are placed from the chart and 40 represents the distance your eye reads the chart:

This is incorrect. While the first number is correct (the distance from the chart), the second number should represent the distance a person with normal vision can read the same line, not the patient's distance.

D. 40 represents the distance you are placed from the chart and 20 represents the distance a normal eye reads the chart:

This is incorrect. The standard for visual acuity measurements is that the first number represents the testing distance (usually 20 feet), and the second number represents the distance at which a normal eye can read the line.

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What is the primary pathophysiology of glaucoma?

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Naxlex Comprehensive Predictor Exams

A 75-year-old male who is a chronic alcoholic present to the medical office for his annual wellness visit. How would describe the findings found in photo?

Correct Answer is C

Explanation

A nurse is performing a complete physical examination on a patient. After examining the patient with the Snellen chart, the nurse documented distance vision in both eyes 20/40. The patient asks the nurse what 20/40 means:

Correct Answer is A

Explanation

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