FREE COA Ophthalmic Knowledge and Diagnostic Questions and Answers
Corneal curvature measurement is vital to ensure that contact lens _______.
Explanation:
Corneal curvature measurement is vital to ensure that contact lenses fit properly and comfortably. Contact lenses should rest on the cornea, the clear front surface of the eye, for optimal vision correction and comfort. Resting on the cornea ensures proper alignment and avoids discomfort or complications.
Which statement is TRUE pertaining to the use of plain gut sutures?
Explanation:
Plain gut sutures are absorbable, meaning they are gradually broken down and digested by the body's enzymes over time. This characteristic makes them suitable for use in tissues where permanent support is not required.
When pupils are of unequal size it is called:
Explanation:
Anisocoria specifically describes unequal pupil sizes.
The state of pupillary contraction is known as:
Explanation:
Miosis refers to the state of pupillary constriction, where the pupil is constricted or smaller than normal.
Which cannot be used for color vision testing?
Explanation:
The fly test is not typically used for color vision testing. Options A, B, and C are commonly used methods for assessing color vision. Pseudoisochromatic plates, such as the Ishihara plates, are used for screening color vision deficiencies. Hardy-Rand-Ritter plates are used for testing acquired color vision defects. The Nagel anomaloscope is used for diagnosing and quantifying congenital color vision deficiencies.
Which process is useful for measuring corneal astigmatism?
Explanation:
Keratometry is a process used to measure corneal astigmatism by assessing the curvature of the cornea.
The use of topical steroids may induce which of the following?
Explanation:
The prolonged use of topical steroids can induce the development of cataracts, which are opacities in the lens of the eye. Cataracts can lead to blurry vision and ultimately require surgical removal for vision improvement.
Of the following conditions, which one is least likely to cause transient loss of vision?
Explanation:
Thyroid disorders can lead to various ocular manifestations such as proptosis (bulging eyes) and double vision, but they are less likely to cause transient loss of vision compared to conditions like carotid artery disease or migraine, which can directly affect blood flow to the eyes or brain.
The term used to refer to symptoms due to uncorrected refractive error is ______ :
Explanation:
Asthenopia refers to symptoms like eye strain, headaches, or discomfort due to uncorrected refractive error, particularly focusing difficulties.
Which of the following conditions is NOT hereditary?
Explanation:
Conjunctivitis, also known as pink eye, is typically caused by infections (viral or bacterial) or allergies and is not inherited. The other conditions listed (migraines, diabetes, and nystagmus) have hereditary components.
The amoric environment in the operating room is created by all steps below with the exception of the:
Explanation:
The use of powdered gloves is not conducive to creating an aseptic (or amoric) environment in the operating room because the powder can introduce particulate matter, potentially contaminating the surgical field. The other options—use of lint-free drapes, rinsing instruments with saline, and use of millipore filters—contribute to maintaining a sterile environment.