Free Cornea and External Disease Questions and Answers — Questions and Answers
Question 1: Which condition is characterized by progressive thinning of the cornea?
- Conjunctivitis
- Keratoconus (Correct answer)
- Blepharitis
- Scleritis
Correct answer: Keratoconus
Dry eye disease results from insufficient tear production or rapid tear evaporation, leading to inadequate lubrication of the eye surface. The most common and characteristic symptom is a persistent gritty, scratchy, or burning sensation in the eyes. This discomfort can be accompanied by redness, stinging, and sometimes reflex tearing.
Question 2: What is the primary symptom of dry eye disease?
- Double vision
- Gritty or burning sensation (Correct answer)
- Sudden vision loss
- Itchy scalp
Correct answer: Gritty or burning sensation
Pseudomonas aeruginosa is a highly aggressive bacterium frequently implicated in severe contact lens-related keratitis. This microorganism can rapidly cause corneal ulcers and significant vision loss due to its ability to adhere to contact lenses and produce damaging toxins. Prompt diagnosis and treatment are crucial to prevent serious complications.
Question 3: Which microorganism is most commonly associated with contact lens-related keratitis?
- Candida albicans
- Staphylococcus epidermidis
- Pseudomonas aeruginosa (Correct answer)
- Herpes simplex virus
Correct answer: Pseudomonas aeruginosa
Bacterial conjunctivitis is an infection of the conjunctiva, typically presenting with redness, discharge, and irritation. The first-line treatment involves topical antibiotic eye drops or ointments. These medications effectively target and eliminate the bacteria, reducing symptoms and preventing the spread of the infection.
Question 4: What is the typical first-line treatment for bacterial conjunctivitis?
- Oral steroids
- Topical antibiotics (Correct answer)
- Antihistamines
- Artificial tears only
Correct answer: Topical antibiotics
Blepharitis is a chronic inflammatory condition affecting the eyelid margins, often caused by bacterial overgrowth or dysfunction of the meibomian glands. Key symptoms include redness, itching, irritation, and crusting of the eyelashes, along with a persistent gritty sensation in the eyes.
Question 5: Which condition involves inflammation of the eyelid margins?
- Episcleritis
- Blepharitis (Correct answer)
- Keratitis
- Uveitis
Correct answer: Blepharitis
The Schirmer test is a common diagnostic procedure used to evaluate the quantity of tear production. It involves placing a small strip of filter paper inside the lower eyelid for a few minutes to measure the amount of moisture absorbed. This test helps in diagnosing dry eye conditions and assessing tear film function.
Question 6: Which test is commonly used to evaluate tear production?
- Amsler grid test
- Fluorescein angiography
- Schirmer test (Correct answer)
- Tonometry
Correct answer: Schirmer test
Glaucoma is a group of eye conditions that damage the optic nerve, often linked to elevated intraocular pressure (IOP). The primary objective of glaucoma treatment is to lower and maintain a healthy IOP. This crucial step helps to prevent further damage to the optic nerve and preserve the patient's remaining vision.
Free Cornea and External Disease Questions and Answers
Which condition is characterized by progressive thinning of the cornea?