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정상안압녹내장 환자의 망막신경섬유층 두께와 시야검사의 상관관계
김예니,강자헌,김재석,이주화,Ye-Ni Kim,M,D,Ja-Heon Kang,M,D,Jae-Suk Kim,M,D,Joo-Hwa Lee,M,D 대한안과학회 2005 대한안과학회지 Vol.46 No.9
Purpose: This study was performed to evaluate the validity of optical coherence tomography 3000 (OCT3) in the diagnosis of normal tension glaucoma (NTG). Methods: One-hundred and eighty eyes with NTG or glaucomatous optic disc changes by direct ophthalmoscope and 51 normal eyes were included. Mean deviation (MD) and pattern standard deviation (PSD) were acquired by the Humphrey visual field analyzer. Mean retinal nerve fiber layer (RNFL) thickness was measured by OCT3. We analyzed the relationships between MD and mean RNFL thickness, PSD, and mean RNFL thickness. We also analyzed differences in the change of mean RNFL thickness according to the change of visual field defect progression. Results: MD and PSD were proportional to the mean RNFL thickness, using the Pearson correlation coefficient: 0.418 (p=0.001) and -0.397 (p=0.002), respectively. There was a significant decrease in the mean RNFL thickness according to the visual field defect severity. Particular, the RNFL thickness of the superior and inferior quadrants were significantly decreased in the severe visual field defect groups. The difference between the mean RNFL thicknesses in pre-perimetric glaucoma between the normal eye and early glaucoma groups was not statistically significant. Conclusions: The mean RNFL thickness measured by OCT3 could be considered as valid parameter for the diagnosis of NTG. For early diagnosis of glaucoma, however, visual field test must be considered with OCT3.
김지연,강자헌,Ji Yeon Kim,Ja Heon Kang 대한안과학회 2006 대한안과학회지 Vol.47 No.10
Purpose: To report a case of iridocorneal endothelial syndrome with pigmentary glaucoma. Methods: We encountered a 44-year-old unilateral glaucoma patient who complained of intermittently decreased visual acuity in the right eye. For differential diagnosis, we carried out ophthalmic and systemic examination. Results: Binocular corrected visual acuity was 1.0. His intraocular pressure, measured using a Goldmann applanation tonometer, was 50 mm Hg in the right eye and 18mm Hg in the left. Upon examination of the right eye, we found pigments with a Krukenberg`s spindle appearance on the corneal endothelium, peripheral anterior synechia extending beyond Schwalbe`s line, trabecular hyperpigmentation, endothelial pleomorphism, polymegathism, cell loss, dark area within the cells, a light central spot and light peripheral zone, retinal nerve fiber layer defects, and visual field defects, which together led to the diagnosis of iridocorneal endothelial syndrome with pigmentary glaucoma. We observed progressed glaucomatous injury upon examination of the disc stereo photograph, retinal nerve fiber layer photograph, and visual field test, even though we used topical IOP reducers. Eventually, we performed a trabeculectomy in the right eye. Conclusions: We experienced a case of iridocorneal endothelial syndrome with unilateral pigmentary glaucoma. The glaucoma was not well-controlled with topical IOP reducers. The glaucoma was then treated by a trabeculectomy. We report this case with a review of the literature.
빛간섭단층촬영을 이용한 망막신경섬유층 검사시 발생한 오류의 양상
황영훈,강자헌,Young-Hoon Hwang,Ja-Heon Kang 대한안과학회 2008 대한안과학회지 Vol.49 No.5
Purpose: To investigate the frequency and characteristics of artifacts which can cause errors in retinal nerve fiber layer analysis using optical coherence tomography (OCT). Methods: The frequency, characteristics and retinal lesions responsible for the artifact were analyzed for 179 patients (338 eyes) by OCT. All images were categorized into two groups according to the presence of artifacts and then, the differences between the two groups were analyzed by t-test and cross-tabulation analysis in terms of age, refractive error, peripapillary atrophic areas, and type of glaucoma. Results: The male to female ratio was 1.37:1, average age was 47.6±15.7 years and average degree of refraction was -1.78±0.23 diopter. Artifacts were noted in 64 eyes (18.9%), and were present in the temporal quadrant in 12 eyes (18.8%), superior quadrant in 51 eyes (79.7%), nasal quadrant in 19 eyes (87.5%), and inferior quadrant in 8 eyes (48.4%). The average angle of the artifact was 138 degrees. Although retinal lesion, age, and glaucoma type were not significantly different between the two groups, peripapillary atrophy and myopia were significantly more common in the group with the artifact. Conclusions: When analyzing retinal nerve fiber layer by OCT, artifacts should be considered, especially in cases of peripapillary atrophy and myopia.