Lenses and Prisms — MCQs

Identify the visual field defect depicted by the boxed pair of diagrams at the bottom of the image. The left diagram represents the right eye (OD), the right diagram represents the left eye (OS), and the dark regions indicate visual field loss.

What is the true statement about retinoscopy with a plane mirror?

What type of refractive error is astigmatism, which is characterized by non-spherical curvature of the cornea or lens?

Which keratometry reading is most accurate in post-LASIK eyes for IOL power calculation?

A radiograph is obtained from a child with scoliosis. What is the name of the angle used to measure spinal curvature?

Treatment of presbyopia is by use of which type of lens?

Maximum correction of myopia can be done by?

1mm change in axial length of the eyeball would change the refracting power of the eye by?

Shortening of 2 mm of axial length of the eyeball causes?

Which instrument is shown below?