Lasers for Eye-Diagnostics

Laser Biometry provides accurate measurements of the eye-length, the curvature of the cornea and the depth of the eye chamber, which are superior to the older ultrasonic technique. These measurements are important for the optimum adaption of plastic lenses implanted after cataract operations. 

The high resolution optical coherence tomography (Sect. 7.13) is used to measure the thickness and possible wrinkles of the retina, which might lead to its detachment resulting in blindness. In Fig. 10.53 such an optical coherence tomogram of the retina is shown. Measurements at definite time intervals can show changes of the macula degeneration, a decease which is often found for elder people. 

Fluorescence angiography allows a very accurate measurement of the blood vessels in the retina. A dye solutions, such as fluorescine is injected into the veins and 

---