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ophthalmoscope (of-thal´mә-skōp)   an instrument for examining the interior of the eye.
 

direct ophthalmoscope  one that produces an upright image of approximately 15× magnification. This type is used to inspect the fundus of the eye (inner surface of the back of the eyeball). The examiner looks for changes in the color or pigment of the fundus, changes in the caliber and shape of retinal blood vessels, and any abnormalities in the macula lutea. Macular degeneration and lens opacities can be seen this way.

indirect ophthalmoscope  one that produces an upside down image of two to five times magnification and is used for stereoscopic inspection of the interior of the eyeball in order to diagnose retinal tears, holes, and detachments.

scanning laser ophthalmoscope(SLO)    an instrument for retinal imaging in which light from a low-power laser beam that scans the retina is reflected back to a sensor; the light detected by the sensor is used to create a full-color composite digital image.





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