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目的探讨早期有症状的老年性白内障患者手术前后对比敏感度(contrastsensitivity,CS)和眩光敏感度(glaresensitivity,GS)的变化,为手术时机的选择提供科学依据。方法选择最佳矫正视力在0.5—1.0的42人共63眼,检查、分析患者术前1d及术后3w的视力、CS和GS。结果术前不同视力患者各频段的CS比较,仅高频段差异有显著意义(P<0.05),低、中频段差异无显著意义(P>0.05);各频段GS比较,差异无明显意义(P>0.05)。术后3周时视力、CS和GS较术前均明显提高,差异有显著意义(P<0.01)。虽然术前矫正视力为0.9～1.0的11眼与术后最佳矫正视力比较,差异无显著意义(P>0.05),但不同视角的CS及GS较术前均提高,差异有显著意义(P<0.05)。视力、CS、GS的变化与白内障的类型、混浊程度、部位、瞳孔大小密切相关,其客观量化仍需深入探讨。结论CS及GS检查可早期、灵敏、全面地反映早期老年性白内障患者的视功能状态,为早期有症状的老年性白内障患者确定手术时机提供科学依据,亦是评价手术疗效的有效标准。
Objective To investigate the changes of contrast sensitivity (CS) and glare sensitivity (GS) before and after surgery for early symptomatic senile cataract patients and provide a scientific basis for choosing the timing of surgery. Methods Totally 63 eyes of 42 persons with the best corrected visual acuity (0.5-1.0) were selected. Visual acuity, CS and GS were measured and analyzed at 1 day and 3 weeks after operation. Results There was no significant difference in CS between different frequency bands (P <0.05). There was no significant difference between low and middle frequency bands (P> 0.05) > 0.05). Visual acuity, CS and GS were significantly increased at 3 weeks after operation, with significant difference (P <0.01). Although the preoperative corrected visual acuity was 0.9 ~ 1.0 in 11 eyes and postoperative best corrected visual acuity, the difference was not significant (P> 0.05), but CS and GS in different visual acuity were significantly higher than preoperative, the difference was significant (P <0.05). Visual acuity, CS, GS changes and cataract type, degree of turbidity, location, pupil size are closely related to the objective quantification still need further study. Conclusion The CS and GS tests can reflect the functional status of early senile cataract patients early, sensitively and comprehensively, and provide a scientific basis for determining the timing of surgery in the early symptomatic senile cataract patients. It is also an effective standard to evaluate the curative effect of surgery.