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Glaucoma Consultation

Fluctuations in Eye Pressure

Testing for glaucoma involves the measurement of intraocular pressure (IOP) within the eye. The pressure in your eye changes over the course of the day, this change is called the diurnal variation. People with glaucoma, may have wider swings in pressure than unaffected people. For most people eye pressure is highest in the morning and lower during the evening and while sleeping.

Because eye pressure fluctuates during the day, doctors monitor people diagnosed with glaucoma to accurately assess their progress and to make sure that the medication is working as desired. Doctors also monitor the eye pressure of people who are not diagnosed to ensure that eye pressure fluctuates in a typical manner.

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Dark Room Proactive Test

If an individual is strongly predisposed for glaucoma, the dark room adaption test will help doctors rule out glaucoma. In this test, patients are placed in a dark room for an hour to an hour and a half while their eye pressure is measured regularly. If the patient has a tendency for developing closed angle glaucoma, eye pressure can rise during the process helping the doctor assess the status of the patient.

Computer-Assisted Visual Field Examination (Perimetry)

Mapping the visual field is referred to as perimetry. There are two basic methods of perimetry: kinetic and static. The static methods uses a still object. A source of light is illuminated briefly and patients are asked if they saw or didn't see the light. In static threshold perimetry the light gets more and more intense from dim to bright until is visible.

Visual field testing is a key clinical function that is part of a complete eye examination. Analysis of visual field data by computer helps build a map of a patient’s visual response in the retina and its associated neurological tissues. This is the visual field map in detail.

Visual field testing allows doctors to gain important information about many of the blindness-causing diseases. Early detection and close monitoring of the progress of glaucoma enhances a patient’s chance of treatment success.

Optic Nerve Head Assessment through Retina Tomograph

One of the most effective clinical assessments of glaucoma is the study of the tissues of the optic nerve head. The crater-like depression at the front of the optic nerve head is monitored. If it is consistent with visual field loss doctors can move closer to an informed diagnosis. They then monitor changes to forestall further vision loss.

Through the retina tomograph doctors can categorize a patient as"glaucoma suspect" which means that the patient has borderline symptoms, in this case a suspicious looking optic nerve head. With the retina tomograph, a single laser beam is directed onto the optic nerve on the back of the retina. The beam scans the optic nerve and information is acquired by a computer for analysis. This procedure is painless and is a live image of the eye's interior.

Diagnostic Evaluation (Gonioscopy)

Gonioscopy is an evaluation technique for hard-to-see features of the eye. This is a procedure that seeks to differentiate a healthy eye from one that tends towards certain kinds of glaucoma.

The procedure includes administering an anesthetic drop for the comfort of the patient. Then a special mirrored contact lens is placed on the eye. Through this lens doctors can observe what cannot be seen by more common procedures. The goal of Gonioscopy is to look into the fluid filtration angles of the eyes.

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