Korean J Ophthalmol.  1994 Dec;8(2):53-60. 10.3341/kjo.1994.8.2.53.

Quantitative analysis of changes of automated perimetric thresholds after pupillary dilation and induced myopia in normal subjects

• Park HJ
• Youn DH

• KMID: 1735124
• DOI: http://doi.org/10.3341/kjo.1994.8.2.53

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.

Keyword

dilation; induced myopia; pupil size; refractive state; threshold sensitivity

MeSH Terms

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
Tropicamide