The visual fields machine monitors your eye position and presents all spots several times, so do not worry about making a mistake. Visual field analysis is important for diagnosing and monitoring glaucoma, strokes, and tumors. It is also helpful with patients having headaches or unexplained vision loss. This test begins with an injection of a small amount of dye into a vein. It is not the same dye used in angiography of the heart, neck, or brain.
Some patients have ocular conditions which result in poor tear production and a dry eye.
This plugs the tear drain of the eye and the reduced outflow helps maintain the tear film. Punctal plugging is performed on a temporary basis with collagen plugs which dissolve, or on a more permanent basis with silicone plugs. If there is significant improvement, we permanently close the drain with argon laser ablation. Pachymetry determines corneal thickness to an accuracy of one micron-one millionth of a meter. It is useful because we can shine this laser light into the eye to perform operations that previously required a surgical incision.