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Abstract #6380 Published in IGR 3-2
Influence of cataract surgery on automated perimetry in patients with glaucoma
Hayashi K; Hayashi H; Nakao F; Hauashi FAmerican Journal of Ophthalmology 2001; 132: 41-46
PURPOSE: To investigate the influence of cataract surgery on automated perimetry in patients with glaucoma. DESIGN: An interventional case series. METHODS: A total of 105 eyes of 105 consecutive patients with glaucoma who were scheduled for cataract surgery underwent Humphrey static threshold testing (30-2 program) before and at one month after surgery. The eyes were divided into two groups based on the presence of absolute or near absolute (dense) scotomata before surgery (minimum threshold value 5 dB or less). Changes in numbers of dense scotomata, mean deviation, pattern SD, and corrected pattern SD, were analyzed. RESULTS: No significant changes were found in the numbers of dense scotomata and central dense scotomata within five-degree visual fields between before and after surgery. In the group with dense scotomata, the mean pattern SD and corrected pattern SD worsened significantly after surgery, whereas the mean deviation improved significantly. However, in the group without dense scotomata, the pattern SD and corrected pattern SD showed a slight improvement, while the mean deviation improved significantly. When the central scotoma was present in two or fewer meridians before surgery, the mean visual acuity after surgery reached 20/25 and was better than that in patients with three or four central scotoma (p = 0.0014). CONCLUSIONS: Cataract does not produce dense scotoma on automated perimetry. However, because it does produce relative scotomata, actual glaucomatous visual field defects may be hidden to some extent. When a central dense scotoma is present before surgery in two or fewer meridians, the patient may well achieve substantial improvement in postoperative visual acuity.
Dr K. Hayashi, Hayashi Eye Hospital, 4-7-13 Hakataekimae, Hajata-ku, Fukuoka 812, Japan. hayashi-ken@hayashi.or.jp
Classification:
6.6.2 Automated (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
12.12.3 Phacoemulsification (Part of: 12 Surgical treatment > 12.12 Cataract extraction)
