异种巩膜作加压材料治疗视网膜脱离

采用异种（猪）巩膜作加压材料治疗35例（35只眼）视网膜脱离，术后近期全部视网膜复位。随访中有5例复发，其中4例第2次手术，再复位2例，治愈率91.4%.经3年以上随访，术后均无明显免疫排斥反应、加压物排出、暴露及感染发生。猪巩膜具有人巩膜相似的优良特性，可代替异体（人）巩膜应用于眼科临床。 （中华眼底病杂志，1994，10：207-209）     

THE INFLUENCE OF TEMPORAL FREQUENCY AND WAVELENGTH ON BETA MOVEMENT

The maximum displacement threshold for beta (apparent) movement was determined using small near-monochromatic stimuli subtending 2 min arc, over the frequency range 1.67-6.67 Hz. Displacement thresholds for the apparently oscillating spot were dependent upon both temporal frequency (F(9,903) = 1413) and wavelength (F(12,903) = 19.6), the stimuli having been equated for luminance. Significant interaction effects (F(108,903) = 3.32) demonstrated that the influence of colour varied with temporal frequency. It is suggested that short-range apparent movement over this frequency range may be mediated by a mechanism which is colour dependent.     

MODELLING THE RESULTS OF THE ORTHOPTIC TREATMENT OF DIVERGENCE EXCESS

Using data compiled from an earlier study of the results of the orthoptic treatment of divergence excess [Daum, K. M. Ophthal. Physiol. Opt. 4, 15-24 (1984)], a model has been presented regarding the results of the treatment. Provided the calibration sample is representative, the model may be used after an initial examination to predict the class of success a given subject will eventually be placed in as a result of orthoptic treatment. After treatment with a standard orthoptic regimen, the subjects were classified as being either totally successful (no objective or subjective visual difficulties) or partially/not successful. Stepwise discriminate analysis of 15 independent variables for the dependent variable success was used in order to choose the model with the highest coefficient of determination (r2) and the best statistical significance. The three variables chosen for the model were the angle of deviation at near and the blur and break values of the negative vergences at near. Using these variables, discriminant analysis was performed on the calibration sample of nine subjects. Each was classified correctly. The use and limitations of the model are briefly discussed.