Castilla-Marti Miguel, van den Berg Tom J T P, de Smet Marc D
*MIOS SA, Retina and Ocular Inflammation Clinic, Lausanne, Switzerland; and †Netherlands Institute for Neuroscience, Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, the Netherlands.
Retina. 2015 Jun;35(6):1240-6. doi: 10.1097/IAE.0000000000000456.
To evaluate the effect of vitreous floaters on intraocular straylight.
Records of bilaterally phakic patients with unilateral complaint of floaters as the main symptom were identified from an electronic database. Patients who underwent straylight measurements on both affected and unaffected eyes using a C-Quant straylight meter were selected. Data were collected on age, sex, visual acuity, straylight measurements, and optical coherence tomography. The unaffected eye served as a control.
Fifteen cases were included (7 women and 8 men; mean age, 54.3 years; age range, 24-71 years). Visual acuity was not correlated with the complaint of floaters. Average straylight value in eyes with floaters was 1.426 log(s) (±0.23 SD) with a median value of 1.52 log(s). The mean value for fellow eyes was 1.275 (±0.23 SD) with a median of 1.25 log(s). The differences between both groups using a Wilcoxon matched-pair signed-rank test was statistically significant at P = 0.0009. On optical coherence tomography, most patients had a confirmed or probable posterior vitreous detachment. However, in four patients, a posterior vitreous detachment was absent in the affected eyes. Vitreous floaters were inconsistently imaged by optical coherence tomography, with only a few patients presenting appreciable condensations close to the retinal surface. These were present in both affected and unaffected eyes.
Intraocular straylight is significantly increased in eyes affected by floaters. No correlation was seen with vision or optical coherence tomography appearance. Straylight is an independent objective measure of visual perception that seems to be closely correlated to complaints expressed by patients experiencing floaters.
评估玻璃体漂浮物对眼内杂散光的影响。
从电子数据库中识别出以单侧漂浮物为主要症状的双侧有晶状体患者的记录。选择使用C-Quant杂散光仪对患眼和未患眼进行杂散光测量的患者。收集年龄、性别、视力、杂散光测量值和光学相干断层扫描数据。未患眼作为对照。
纳入15例患者（7例女性和8例男性；平均年龄54.3岁；年龄范围24 - 71岁）。视力与漂浮物主诉无关。有漂浮物的眼睛的平均杂散光值为1.426 log(s)（±0.23标准差），中位数为1.52 log(s)。对侧眼的平均值为1.275（±0.23标准差），中位数为1.25 log(s)。使用Wilcoxon配对符号秩检验，两组之间的差异在P = 0.0009时具有统计学意义。在光学相干断层扫描中，大多数患者有确诊或可能的玻璃体后脱离。然而，4例患者的患眼中没有玻璃体后脱离。光学相干断层扫描对玻璃体漂浮物的成像不一致，只有少数患者在视网膜表面附近出现明显的浓缩物。这些在患眼和未患眼中均有出现。
受漂浮物影响的眼睛中眼内杂散光显著增加。与视力或光学相干断层扫描表现无相关性。杂散光是视觉感知的一种独立客观测量指标，似乎与有漂浮物的患者所表达的主诉密切相关。
