Optical Coherence Tomography
As part of our commitment to provide the latest in eye care services and technology to our patients, we have added a new instrument to assist in diagnosing, monitoring, and treating retinal conditions such as glaucoma and macular degeneration. Our OCT enables us to perform a scan of the different retinal layers and evaluate the images to assist in identifying the subtlest pathology. In addition to scanning posterior ocular anatomy, the OCT also enables us to scan the anterior ocular anatomy as well. Every scan gives us a dense cube of data which can be viewed in 3-D, rotated for different views, and dissected to see different areas of concern for analysis. With this new technology, the doctors at East Memphis Optometry can continue to provide our patients with the highest quality of care available.
Fundus photography is the creation of a photograph of the interior surface of the eye, including the retina, optic disc, macula, and posterior pole.
Fundus photography is used to detect and evaluate symptoms of retinal detachment or eye diseases such as glaucoma.
In patients with headaches, the finding of swollen optic discs, or papilledema, on fundus photography is a key sign, as this indicates raised intracranial pressure (ICP) which could be due to hydrocephalus, benign intracranial hypertension (aka pseudotumor cerebri) or brain tumor, amongst other conditions. Cupped optic discs are seen in glaucoma.
In patients with diabetes mellitus, regular fundus examinations (once every 6 months to 1 year) are important to screen for diabetic retinopathy, as visual loss due to diabetes can be prevented by retinal laser treatment or intravitreal injections, if retinopathy is spotted early.
In arterial hypertension, hypertensive changes of the retina closely mimic those in the brain, and may predict cerebrovascular accidents (strokes).
A visual field is an eye examination that can detect dysfunction in central and peripheral vision which may be caused by various medical conditions such as glaucoma, stroke, brain tumors or other neurological deficits.
Perimetry is one way to systematically test the visual field. It is the systematic measurement of differential light sensitivity in the visual field by the detection of the presence of test targets on a defined background. Perimetry more carefully maps and quantifies the visual field, especially at the extreme periphery of the visual field. The name comes from the method of testing the perimeter of the visual field.
Corneal topography is a non-invasive medical imaging technique for mapping the surface curvature of the cornea, the outer structure of the eye. Since the cornea is normally responsible for some 70% of the eye's refractive power, its topography is of critical importance in determining the quality of vision and corneal health.
The three-dimensional map is therefore a valuable aid and can assist in the diagnosis and treatment of a number of conditions or in assessing the fit of contact lenses. A development of keratoscopy, corneal topography extends the measurement range from the four points a few millimeters apart that is offered by keratometry to a grid of thousands of points covering the entire cornea. The procedure is carried out in seconds and is completely painless.