Visual acuity and stimulus area
β Scribed by Giovanni Vicario
- Publisher
- Guilford Publishing Inc
- Year
- 1971
- Tongue
- English
- Weight
- 810 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0340-0727
No coin nor oath required. For personal study only.
β¦ Synopsis
In measuring the distance at which we can observe the fine details of the three stimuli shown in Fig. 3 (striped squares, whose areas are 25, 5 and 1 cm2), we obtain that visual acuity is inversely proportional to the area of the stimulus. Furthermore, visual acuity increases (decreases) in the same way as decreases (increases) the area of the stimulus. This relation should be expressed by an hyperbolic function.
Zusammen/assung. Wenn man den Abstand miBt, aus dem die feinen Einzelheiten der drei gestreiften Quadrate yon 25, 5 und 1 cm ~ in Abb. 3 eben erkennbar sind, ergibt es sich, dab die SehschErfe umgekehrt proportional der Reizfl~che ist, das heiBt, dab sie mit zunehmender Reizfl~che abnimmt und mit abnehmender zunimmt. Diese Abh~ngigkeit kann als hyperbolische Funktion dargestellt werden.
π SIMILAR VOLUMES
In recent years the shape and location of the spectral luminosity curves of colour blind individuals have been determined with flood precision (Pitt, 1935;Hecht # Shlaer, 1936). Fifl. 1 presents the /.o C6 o.2 // i"~ "\ ...-f:" /Yorma/ : / "..
## Abstract This study investigates the hypothesis that the degree of retinal pigmentation in the human eye is adaptive as it relates to the maintenance of visual acuity in optically stressful environments, deserts and snowfields. Eightyβfour subjects were examined, an estimation of their degree of