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Corneal topography, also known as photokeratoscopy or videokeratography, is a non-invasive medical imaging technique for mapping the anterior 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 , [ 1 ] its topography is of critical importance in determining ...
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Diagnosis is most often by topography. Topography measures the curvature of the cornea and creates a colored "map" of the cornea. Keratoconus causes very distinctive changes in the appearance of these maps that allow doctors to make the diagnosis. Initially, the condition can typically be corrected with glasses or soft contact lenses. [3]
The Heidelberg Retinal Tomography is a diagnostic procedure used in ophthalmology.The Heidelberg Retina Tomograph (HRT) is an ophthalmological confocal point scanning laser ophthalmoscope [1] for examining the cornea and certain areas of the retina using different diagnostic modules (HRT retina, HRT cornea, HRT glaucoma).
Template: Eye diagram noframe. ... Download as PDF; Printable version; In other projects ... 1:posterior segment 2:ora serrata 3:ciliary muscle 4:ciliary zonules 5 ...
Diagram of light and four Purkinje images [1] An eye with Purkinje images. Purkinje images are reflections of objects from the structure of the eye. They are also known as Purkinje reflexes and as Purkinje–Sanson images. At least four Purkinje images are usually visible in the normal eye.
Line 1 in the diagram represents a patient's preoperative astigmatism by magnitude (length of the line) and axis (which in a DAVD is twice the patient's measured axis of preoperative astigmatism). Line 2 represents the target astigmatism—that is, the magnitude and axis of the correction the surgeon would like to achieve.
Ocular evisceration is the removal of the eye's contents, leaving the scleral shell and extraocular muscles intact. [1] [2] The procedure is usually performed to reduce pain, improve cosmetic appearance in a blind eye, treat cases of endophthalmitis unresponsive to antibiotics, or in the case of ocular trauma.