Quantitative analysis of changes of automated perimetric thresholds after pupillary dilation and induced myopia in normal subjects.
- Author:
Hyun Joon PARK
1
;
Dong Ho YOUN
Author Information
- Publication Type:Original Article
- Keywords: dilation; induced myopia; pupil size; refractive state; threshold sensitivity
- MeSH: Adult; Female; Humans; Male; Myopia/etiology/*physiopathology; Pupil/drug effects; Pupil Disorders/chemically induced/*physiopathology; Retina/physiology; Sensory Thresholds/*physiology; Tropicamide/pharmacology; Visual Field Tests; Visual Fields/*physiology
- From:Korean Journal of Ophthalmology 1994;8(2):53-60
- CountryRepublic of Korea
- Language:English
- Abstract: We quantitatively analyzed the changes of the (retinal) threshold sensitivities between normal status and dilated emmetropic status, and between dilated emmetropic status and -1.0D induced myopic status. Three consecutive visual field examinations by Humphrey Field Analyzer C-30-2 threshold test and STATPAC program were performed in 36 eyes of 21 normal subjects who ranged in age from 23 to 40 years. The results were as follows: 1) There was a statistically significant decrease (0.87 +/- 0.91dB)in the mean threshold sensitivity within the central 30 degrees at the dilated emmetropic status (27.90dB) as compared with the normal status (28.77dB)(p = 0.0001). 2) There was a statistically significant decrease(0.99 +/- 0.61dB) at -1.0D induced myopic status(26.91dB) as compared with the dilated emmetropic status(27.90dB)(p = 0.0001). 3) After dilation, the mean threshold sensitivity between 20 and 30 degrees of field showed statistically significant decrease as compared with those within the central 20 degrees of visual field(p < 0.05). In case of -1.0D induced myopia, there were uniform decreases in the mean threshold sensitivities within the central 30 degrees of visual field (p > 0.05). Therefore, we emphasize the importance of consistent pupillary size and correct refractive state in performing the serial automated visual field tests.
