Patient History and Ophthalmic Examination Techniques Flashcards
6 cards from real COT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Patient History and Ophthalmic Examination Techniques flashcards as text
Which method is used to test color vision and is most sensitive for detecting red-green deficiencies?
Answer: Ishihara pseudoisochromatic plates
Ishihara pseudoisochromatic plates are the standard screening tool for red-green color vision deficiencies and are highly sensitive for these common defects.
When recording extraocular muscle (EOM) function, 'full' motility means the eye moves:
Answer: In all nine cardinal positions of gaze without limitation
Full extraocular muscle motility means the eye moves completely and without restriction or pain through all nine cardinal positions of gaze.
Corneal light reflex testing using the Hirschberg method estimates how many prism diopters of deviation for each millimeter of decentration?
Answer: 7 prism diopters
The Hirschberg test estimates approximately 7 prism diopters of deviation for each 1 mm the corneal light reflex is decentered from the pupil center.
Which notation system is used to document the status of the lens during slit-lamp examination?
Answer: LOCS (Lens Opacities Classification System)
The Lens Opacities Classification System (LOCS) provides a standardized grading scale for nuclear, cortical, and posterior subcapsular cataracts.
When obtaining a patient's ocular history, asking about prior LASIK or refractive surgery is important primarily because it affects:
Answer: IOP measurements and IOL power calculations
Prior corneal refractive surgery alters corneal curvature and thickness, making standard IOP measurements and IOL power calculations inaccurate without correction factors.
The near point of accommodation (NPA) test measures:
Answer: The closest point at which a patient can maintain clear focus
The near point of accommodation is the closest distance at which a patient can maintain clear, single vision by maximally contracting the ciliary muscle.