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頁籤選單縮合
題名 | Contrast Sensitivity Changes in Amblyopia Patients=弱視病患之對比敏感度變化 |
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作者 | 劉秀雯; 陳純貞; | 書刊名 | 中華民國眼科醫學會雜誌 |
卷期 | 40:2 2001.06[民90.06] |
頁次 | 頁112-118 |
分類號 | 416.7552 |
關鍵詞 | 弱視; 對比敏感度; Contrast sensitivity; Spatial frequency; Amblyopia; |
語文 | 英文(English) |
中文摘要 | 由於弱視病患之視力評估及治療前後之比較皆以傳統之Landolt或Snellen 視力 表為主,由於前列之檢查皆為百分之百對比下的視力狀況,為瞭解真實情況下的視力障礙, 本篇論文以對比敏感度測試儀來作分析。對於不同原因的弱視病患,我們發現屈光性弱視的 病患,在低空間頻率時,對比敏感度有下降的情形,除此之外,所有的弱視病患在高空頻率 對比敏感度皆下降。至於弱視病患在治療之後,即使一般視力檢查已達 20/20,但我們發現 其對比敏感度仍然與正常眼有統計學上具意義的差距,此外,非弱視眼在被遮蔽一段時間之 後,即使視力並未減退,對於敏感度也有降低的情形,但在停止遮蔽之後,對比敏感度會有 恢復的現象,可見對比敏感度比傳統之視力檢查更能提早發現視覺系統的不良,是檢查弱視 病患一項很好的檢查方法。 |
英文摘要 | PURPOSE:To investigate the interrelationship of contrast sensitivity among amblyopic eyes, dominant eyes and normal eyes, and to evaluate the outcome of amblyopic treatment. METHODS:Contrast sensitivity and visual acuity were examined in 69 eyes of strabismic and/or refractive amblyopic patients (mean age: 8 yrs.) every two months to evaluate the outcome of amblyopia treatment and interrelationship between amblyopic and dominant eyes in unilateral amblyopia. An additional 100 eyes of children with corrected vision >=1.0 were selected for control groups. RESULTS:Reduced contrast sensitivity in amblyopic eyes was most evident at high spatial frequencies (SF). Decreased contrast sensitivity at low SF was also found in refractive amblyopic eyes. Contrast sensitivity function (CSF) improved significantly after treatment with occiusion and/or CAM. However, when visual acuity reached 20/20 in amblyopic eyes, there was still significant difference in CSF between normal and amblyopic eyes. CONCLUSION:Different types of amblyopia had different CSF patterns, which changed with treatment. The relationship between visual acuity and contrast sensitivity was not parallel during treatment. Beside visual acuity, CSF was also an important parameter in the treatment of amblyopia. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。