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.
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A) Dehydration:
When the skin remains tented and returns to its normal position slowly after being pinched, it indicates decreased skin turgor, which is a clinical sign of dehydration. Dehydration can occur due to fluid loss from sweating during vigorous physical activity like a beach tournament.
B) Hypervolemia:
Hypervolemia refers to excess fluid volume in the body, which would typically manifest with signs such as peripheral edema or jugular vein distention rather than decreased skin turgor.
C) Properly Hydrated:
Properly hydrated individuals would have normal skin turgor, where the skin returns promptly to its normal position after being pinched.
D) Infection:
Skin tenting is not a specific sign of infection. Infection would typically present with localized signs such as redness, warmth, swelling, and possibly systemic signs like fever.
Correct Answer is A
Explanation
A) Obesity II:
A Body Mass Index (BMI) of 37 falls within the range of 35 to 39.9, which is classified as Obesity Class II according to the World Health Organization (WHO) BMI categories. This classification indicates a higher risk of obesity-related health conditions and complications.
B) Overweight:
The overweight category corresponds to a BMI range of 25 to 29.9. A BMI of 37 is significantly higher than this range, indicating a more severe level of excess weight and associated health risks.
C) Normal weight:
Normal weight is defined by a BMI range of 18.5 to 24.9. A BMI of 37 is well above this range, indicating that the patient has excess body weight far beyond what is considered normal.
D) Obesity:
While the term "obesity" generally refers to a BMI of 30 or higher, specific classes of obesity (Class I, II, and III) are defined for more precise categorization. A BMI of 37 specifically places the patient in the Obesity II category.
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