Ophthalmoscopy procedure

Ophthalmoscopy Procedure Examination of the eye using an ophthalmoscope, a hand-held, lighted magnifying lens.The ophthalmoscope projects a narrowly focused beam of light that illuminates the structures of the eye. Ophthalmoscopy is the essential introductory examination of the eye and can determine what, if any, further diagnostic procedures are necessary. Ophthalmoscopy allows the doctor to examine the inner […]

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Optical Coherence Tomography (OCT)

Definition Optical Coherence Tomography Optical Coherence Tomography (OCT) – an imaging procedure that noninvasively and painlessly permits the ophthalmologist to visualize the layers of the retina. OCT can provide a “virtual biopsy” of retinal tissue, helping diagnose or monitor age-related macular degeneration (armd), macular holes, retinal tears, and optic nerve inflammation or damage such as can result from glaucoma. The […]

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Phototherapeutic Keratectomy (PTK) – laser eye surgery

Definition of Phototherapeutic Keratectomy Phototherapeutic Keratectomy (PTK) – treatment with an excimer (cool) laser to smooth irregularities and dissipate cloudiness in the cornea. PTK is an ambulatory surgery procedure, with local anesthetic to numb the surface of the eye and a mild sedative for comfort. The procedure takes 20 to 45 minutes, depending on the extent of corneal […]

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Age-Related Macular Degeneration (ARMD)

Definition of ARMD Age-Related Macular Degeneration (ARMD) is progressive condition that results in the gradual deterioration of the macula, the portion of the retina that provides the ability to see fine detail, and loss of vision from the center of the field of vision. ARMD is the leading cause of vision impairment, resulting in functional limitations and […]

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Prosthetic Eye – Definition, Implant

Prosthetic Eye Prosthetic Eye is a cosmetic replacement, also called an ocular prosthesis or artificial eye, for a surgically removed (enucleated) eye. A specialist called an ocularist designs the prosthetic eye to be as close a match in appearance as possible for the remaining natural eye. Prosthetic Eye Implant The most common type of prosthetic eye attaches […]

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Aging, Vision and Eye Changes That Occur With

Age-related Vision and Eye Changes The structures of the eye and the processes of vision begin to undergo changes in the late fourth or early fifth decade of life. By age 65, 50 percent of people have vision impairments. By age 80, more than 90 percent of people have vision impairments. Treatment can mitigate some of these changes, […]

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Refraction Test for Eyes

Refraction Test Refraction Test is a diagnostic procedure to measure refractive errors of the eye, such as myopia, hyperopia, and astigmatism. An optometrist or ophthalmologist conducts the test using a device called a refractor. The refractor fits against the face somewhat like a flattened pair of binoculars, with a chin rest and forehead pad to support the head in proper position. […]

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Amsler Grid – Macular Degeneration Test

Definition of Amsler Grid Amsler Grid is a basic test to detect or monitor the progression of age-related macular degeneration (armd), a condition in which the macula, the area on the retina responsible for fine detail vision, deteriorates. The Amsler grid is a square with evenly spaced horizontal and vertical lines, and a dot in the center […]

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Refractive Surgery – definition, techniques, risks

Refractive Surgery Refractive Surgery – operations to correct refractive errors of vision such as myopia (nearsightedness), hyperopia (farsightedness), and astigmatism (irregularity of the cornea).Refractive surgery became an option for permanent refractive correction in the United States in the 1980s, following its introduction and rapid growth in popularity in Europe. Now, about 1.5 million Americans undergo refractive surgery operations each year. Refractive […]

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Braille Code – What is and History

Braille Code System Braille – a tactile (touch-based) system of written language that features patterns of raised dots to represent letters of the alphabet, common words and contractions, mathematical symbols, and punctuation. Named after its developer, Louis Braille (1809–1852), braille allows people who are blind to read and, with adaptive typewriters and computer technology, to […]

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