Nema's Diagnostic Procedures in Ophthalmology 2nd Edition PDF

By Nema

ISBN-10: 8184485956

ISBN-13: 9788184485950

The publication is a prepared reckoner to conceptualize diagnostic tactics like visible skill, color imaginative and prescient and color blindness, slit-lamp exam, tonometry, gonioscopy and overview of optic nerve head in glaucoma. offers a wealth of complete color photos besides differential analysis to spot quite a few issues.

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Edin J Sci 1798, 9: 97 cited by Duke-Elder ref 6. 5. De valois RL, Abramov I, Jacobs GH. Analysis of response patterns of LGN cells. J Ophthalmol Soc Amer 1966;56:966. 6. Duke-Elder S. Diagnostic Methods: The colour sense. In System of Ophthalmology. Henry Kimpton, London 1962; Vol VII: 380-84. 31 32 Diagnostic Procedures in Ophthalmology 7. Duke-Elder S. Congenital colour defects. In System of Ophthalmology. Henry Kimpton, London 1964; Vol III (Part 2): 661-68. 8. Duke-Elder S. Colour vision. In System of Ophthalmology.

Pseudoisochromatic plates (for example, AO-HRR, Ishihara, Dvorine,Tokyo Medical College, SPP1) provide efficient screening of congenital redgreen defects (efficiency 90-95%). Other tests have been designed to detect achromatopsia (Sloan Achromatopsia test), to differentiate incomplete achromatopsia from complete achromatopsia (Berson blue cone monochromatism plates), to detect acquired defects (SPP-2), or to detect color confusion (City University test). Plate tests have the advantages of being relatively inexpensive, easily available, simple to use, and appropriate with children and persons who are illiterate.

Illumination Illumination affects color vision of low illuminances, the errors increase due to poorer discrimination for most of the hue range while testing color vision. An illuminance of 400 lux (± 100 lux) would be practical value for most clinical applications. Bezold-Burcke Effect von Bezold (1873) and Burcke (1878) discovered independently the phenomenon named after them, that variation of the luminance levels modifies hues. Color Constancy; Aperture Colors and Surface Colors Color constancy is a phenomenon in which color of the objects can be recognized unchanged in spite of possible differences in the illumination.

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Diagnostic Procedures in Ophthalmology 2nd Edition by Nema

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