Which of the following is not one of the three reported types of retinoscopy?

• A. Radical retinoscopy
• B. Off-axis retinoscopy
• C. Changing sleeve position
• D. Dynamic retinoscopy

Answer: (D)

The idea being tested is which retinoscopy approaches are conventionally described as distinct types. The three commonly described variants are radial (or radical) retinoscopy, which examines multiple meridians around the pupil; off-axis retinoscopy, performed with the patient looking away from the central axis to reveal oblique astigmatism or eccentric fixation; and changing sleeve position, where adjusting the retinoscope sleeve changes the illumination plane to improve reflex visibility. Dynamic retinoscopy, while a valid technique used to assess how accommodation affects the reflex, isn’t typically listed as one of these three variants. So dynamic retinoscopy is the not-listed type.