Sloper J J, Collins A D
Strabismus Service, Moorfields Eye Hospital, London, United Kingdom.
Invest Ophthalmol Vis Sci. 1995 Dec;36(13):2663-71.
To study the effect of monocular visual deprivation caused by dense unilateral cataracts in adults.
Visual evoked potentials have been recorded in 11 patients after removal of a dense unilateral cataract acquired in adulthood. These were compared with those from 8 control patients after removal of a mild lens opacity.
Visual evoked potentials recorded on the first day after removal of a longstanding, dense, unilateral cataract showed a marked delay to stimulation of the operated eye compared to the unoperated eye. No delay was found in the operated or unoperated eye of control patients. Delays in the visual evoked potential returned to normal within approximately 3 months after surgery, with the exception of the two patients with the most longstanding cataracts in whom the delays persisted much longer.
The adult central visual system is sensitive to visual deprivation caused by a longstanding, dense, unilateral cataract. The changes found may be important in understanding the causes of intractable diplopia, which sometimes occurs after the removal of such cataracts.
研究成人单侧致密性白内障所致单眼视觉剥夺的影响。
对11例成年后获得性单侧致密性白内障患者术后进行视觉诱发电位记录，并与8例轻度晶状体混浊患者术后的视觉诱发电位进行比较。
与未手术眼相比，长期单侧致密性白内障患者术后第一天记录的视觉诱发电位显示手术眼受刺激时明显延迟。对照组患者手术眼或未手术眼均未发现延迟。除两名白内障病程最长的患者延迟持续时间更长外，视觉诱发电位延迟在术后约3个月内恢复正常。
成人中枢视觉系统对长期单侧致密性白内障所致的视觉剥夺敏感。所发现的变化对于理解此类白内障摘除术后有时出现的顽固性复视的原因可能具有重要意义。
