J Korean Ophthalmol Soc.  1995 Jun;36(6):967-975.

Quantitative Analysis of Changes of Automated Perimetric Thresholds after Pupillary Dilation and induced Myopia in Normal Subjects

• Park HJ
• Yun DH

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 decrease 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.

Keyword

Dilation; Induced myopia; Pupil size; Refractive state; Threshold sensitivity

MeSH Terms

Myopia*
Visual Field Tests
Visual Fields