Clinical Procedures Flashcards

During slit-lamp biomicroscopy, which illumination technique uses a narrow beam to examine corneal layers?

Answer: Optic section

An optic section creates a thin, bright beam that cuts optically through the cornea to reveal its layers and any pathology within them.

The Ishihara color plates are primarily designed to screen for:

Answer: Congenital red-green color deficiency

Ishihara plates use pseudoisochromatic dot patterns that distinguish individuals with normal color vision from those with red-green deficiencies.

When performing confrontation visual fields, the examiner wiggles fingers in the patient's periphery while the patient fixates on the examiner's:

Answer: Nose

The patient fixates on the examiner's nose to maintain central fixation, allowing detection of peripheral field defects.

What does NPA stand for in clinical optometry?

Answer: Near Point of Accommodation

NPA (Near Point of Accommodation) is the closest point at which a patient can maintain clear focus, measured during accommodative testing.

During retinoscopy, which reflex movement indicates myopia when working at one meter?

Answer: Against motion

An 'against' movement of the retinoscopic reflex at one meter indicates the patient is myopic (the far point is between the examiner and the patient).

Which drop is most commonly used to dilate the pupil while cyclopleging the ciliary muscle in pediatric patients?

Answer: Cyclopentolate

Cyclopentolate produces rapid cycloplegia and mydriasis and is the preferred agent for pediatric dilated exams and cycloplegic refractions.

When measuring pupillary distance with a millimeter ruler, the measurement is taken from the center of one pupil to:

Answer: The center of the opposite pupil

Pupillary distance (PD) is the measurement from the center of one pupil to the center of the other, ensuring proper optical alignment in spectacle lenses.