Standard curve and physiological limits of dark adaptation by means of the Goldmann-Weekers adaptometer.
نویسندگان
چکیده
منابع مشابه
Dark adaptation in patients with Best vitelliform macular dystrophy.
Psychophysical dark adaptation studies were performed in six patients with Best vitelliform macular dystrophy (BVMD) using a Goldmann-Weekers dark adaptometer. Prebleach thresholds were determined before obtaining a postbleach full recovery curve. Unlike patients with Stargardt macular dystrophy, all patients with BVMD showed a normal time to reach their baseline dark adapted thresholds after b...
متن کاملColour vision and dark adaptation in high myopia without central retinal degeneration.
Colour vision and dark adaptation of 36 high myopes (68 eyes) without degenerative fundus changes were studied with the standard pseudoisochromatic plates part 2, Farnsworth-Munsell 100 hue (FM 100) test, Nagel anomaloscope, colour vision meter 712-anomaloscope, and Goldmann-Weekers adaptometer. The ages of the myopes ranged from 20 to 49 years, the visual acuity from 6/12 to 6/6, and the refra...
متن کاملQuantification of dark adaptation dynamics in retinitis pigmentosa using non-linear regression analysis.
PURPOSE Non-linear regression analysis was used to determine dark adaptation indices in people with retinitis pigmentosa and in control subjects. METHODS Dark adaptation data were collected for 13 people with retinitis pigmentosa and 21 controls using the Goldmann-Weekers Dark Adaptometer. Data were analysed using an exponential non-linear regression model and dark adaptation indices derived....
متن کاملNegative scotopic ERG and photopic ERG ON response impairment in a patient with normal dark adaptation Subtitle: Negative ERG with normal dark adaptation
Purpose: To present ocular findings in a patient who showed negative scotopic electroretinogram (ERG) and reduced ON response, but normal dark adaptation. Case: A 18-year-old Japanese male patient who complained of severe asthenopia. His corrected visual acuities were 1.2 in both eyes. His fundi were normal. He had normal contrast sensitivity and normal dark adaptation. Methods: The patients un...
متن کاملAssessment of Night Vision Problems in Patients with Congenital Stationary Night Blindness
Congenital Stationary Night Blindness (CSNB) is a retinal disorder caused by a signal transmission defect between photoreceptors and bipolar cells. CSNB can be subdivided in CSNB2 (rod signal transmission reduced) and CSNB1 (rod signal transmission absent). The present study is the first in which night vision problems are assessed in CSNB patients in a systematic way, with the purpose of improv...
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عنوان ژورنال:
- The British journal of ophthalmology
دوره 40 11 شماره
صفحات -
تاریخ انتشار 1956