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안병헌,민병무,박종문 충남대학교 의과대학 지역사회의학연구소 1984 충남의대잡지 Vol.11 No.2
The depth of the anterior chamber decreases with aging. Though the increase in the volume "of the lens with aging is a main influential factor to affect the anterior chamber depth, other unknown factors also work. In human the vitreous occupies about 2/3 of the intraocular volume and is confinded within the rigid scleral shell posteriorly. If there were some changes in the volume of the vitreous, these would result in the displacement of the lens and the iris to change the depth of the anterior chamber directly. We performed vitrectomy in 9 rabbits through the peripheral rerina and observed change in the anterior chamber depth. Slit lamp photography was used to measure the anterior chamber depth. To photograph the identical portion of the anterior chamber consecutively, argon laser photocoaglation was applied on the midperipheral iris at 12 and 6 o'clock positions as the Rlandmarks. We measured and compared the depth of anterior chamber image of the positive film with an aid of micrometer attached to light microscope. The measurement was not real depth of the anterior chamber but that of photographic image. Before vitrectomy the mean depth of the anterior chamber was 2.831±0.111mm. At the postvitrectomy 3rd day and the 1st week, the depth was 2.903±0.123 mm and 2.906±0.092 mm respectively. The depth of the anterior chamber became deeper significantly b t-test (5% significance level). But at the 2nd week, the 4th week and 8th week, the mean of the measurements was 2.885±0.083mm, 2.839±0.096mm, and 2.866±0.113mm respectively. These indicated deeper anterior chamber than those of previtrectomy rabbits, but the results were not significant by t-test. The mean number of scales of Goldmann applanation tonometry before the operation was II. The scale readings were 7 at the postoperative 3rd day, 8 at the 1st week and 9 at the 4th week all, 9 at the 8 th week.