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采用可以长时间戴用的接触镜,新的手术力法及较安全的麻醉剂以后,已经提高了婴儿先天性白内障的治疗效果。但是,手术时机如何选择以及婴儿能否发育成良好的视力还是不明确的。 Marg等曾证明婴儿的视觉诱发电位反应(VER)的电压波形在6个月时即达到成人水平,即视网膜与视中枢此时已具有成人的视物能力。但婴儿的认识能力只能辨别6/60的视标。 Hubel与Wiesel和von Noorden等用视觉剥夺实验(visual deprivation experiments)证明猴与猫完全遮盖视力8-12周后可以产生永久性
The use of contact lenses that can be worn for long periods of time, new surgical techniques and safer anesthetics have increased the therapeutic efficacy of congenital cataracts in babies. However, it is still not clear how the timing of the operation will be chosen and whether the baby will develop good vision. Marg et al. Have demonstrated that the voltage waveform of a baby’s visual evoked potential response (VER) reaches adult levels at 6 months, meaning that the retina and visual center now have adult visual acuity. But the baby’s ability to recognize only 6/60 visual target. Hubel and Wiesel and von Noorden et al. Demonstrated visual deprivation experiments that monkeys and cats completely cover their eyesight for 8-12 weeks to produce permanent