MARK THOMAS / SCIENCE PHOTO LIBRARY MARK THOMAS / SCIENCE PHOTO LIBRARY
Eye examination. Optician using a direct ophthalmoscope to view the interior of a patient's eye. A direct ophthalmoscope is a hand-held illuminated microscope that allows the optician to assess the health of the retina and optic nerve. The retina is the light-sensitive point at the back of the eyeball. Evaluation of the retina and optic nerve is important to check for glaucoma, age-related macular degeneration (AMD), diabetic retinopathy, and other potentially sight-threatening eye conditions.
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