Schraub M, Flament J, Sahel J, Bronner A
J Fr Ophtalmol. 1985;8(5):427-32.
We describe the principles of the measure of visual acuity by using the laser interference retinometer. Interference fringes are projected on the retina, with variation of direction and thickness varied, to study the functional capacity of the macula. This method is particularly useful in patients with cataracts, because it is much less influenced by the clarity of the media than Snellen chart listing. We give the results of a series of 122 eyes with cataract, comparing pre-operative laser acuity and post-operative Snellen visual acuity. The pre-operative interfermometric measure is possible in 77% of the cases, but in most cases of mature cataract or dense posterior subcapsular opacities, the patients do not discern any interference fringes. In immature cataracts according to other results of the literature, post-operative Snellen visual acuity reaches preoperative laser acuity in 60% of the cases, and is better in 29% of the cases. Clinical conditions such as macular degeneration, cystoid macular oedema, amblyopia, visual field cuts through fixation or myopic choroïdopathy, may make the interferometer test unreliable.
我们描述了使用激光干涉视网膜计测量视力的原理。干涉条纹投射在视网膜上，其方向和厚度会发生变化，以研究黄斑的功能能力。这种方法在白内障患者中特别有用，因为与斯内伦视力表相比，它受眼内介质清晰度的影响要小得多。我们给出了122只白内障眼的一系列结果，比较了术前激光视力和术后斯内伦视力。术前干涉测量在77%的病例中可行，但在大多数成熟白内障或致密后囊下混浊的病例中，患者无法辨别任何干涉条纹。根据文献的其他结果，在未成熟白内障中，60%的病例术后斯内伦视力达到术前激光视力，29%的病例术后视力更好。黄斑变性、黄斑囊样水肿、弱视、通过注视点的视野缺损或近视性脉络膜病变等临床情况可能会使干涉仪测试不可靠。
