Ophthalmic Technician

Category - Keratometry, Tonometry, and Refractometry

Which of the following is FALSE regarding convex lenses?
  1. They cause magnification
  2. The movement of the images are against the movement of the lenses
  3. They show movement in both axes
  4. They are used in the treatment of myopia
Explanation
Answer: D - Convex lenses are used in the treatment of hyperopia, presbyopia, aphakia, in various ophthalmic instruments for magnification, as low visual aids. They cause magnification of images and show against-movement of images in both the axes.
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