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The Seidel test is used to assess the presence of aqueous humor leakage from anterior chamber of the eye. [1] Leakage may occur due to many corneal or scleral disorders, including corneal post-trauma, post-surgical leak, corneal perforation and corneal degeneration. [ 1 ]
Seidel's sign (also called Seidel's scotoma) is a sickle-shaped scotoma that is a superior or inferior extension of the blind spot. It occurs in some patients with ...
Erich Seidel (1882–1946) was a German ophthalmologist known for his studies in the field of glaucoma, ocular anesthesia and aqueous humor dynamics. Seidel test and Seidel's scotoma are named after him.
A seidel test detects more subtle or partially self-sealing open-globe injuries. Fluorescein dye is applied to the eye's surface to detect leakage of clear fluid originating from the wound using a Wood's lamp or blue light. [4] This test is avoided in obvious globe injury. [1]
The Seidel test may be used to evaluate the status of the anterior chamber, thereby determining the presence of corneal perforation and pathological anterior chamber leakage. Zone II: region designated by the anterior chamber, lens, and pars plicata; the most common injuries sustained in this region are hyphemas and traumatic cataracts.
In most cases, two thin lenses are combined, one of which has just so strong a positive aberration (under-correction, vide supra) as the other a negative; the first must be a positive lens and the second a negative lens; the powers, however: may differ, so that the desired effect of the lens is maintained. It is generally an advantage to secure ...
The eye, like any other optical system, suffers from a number of specific optical aberrations. The optical quality of the eye is limited by optical aberrations, diffraction and scatter . [ 1 ] Correction of spherocylindrical refractive errors has been possible for nearly two centuries following Airy's development of methods to measure and ...
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