Postma J T, Postma A M, Schnider C M
Pacific University College of Optometry, Forest Grove, OR 97116.
J Am Optom Assoc. 1993 Apr;64(4):258-63.
To determine the differences between prescribing a trial fitted vs. nomogram (System 10) selected rigid gas permeable contact lens, 42 subjects were fit with one lens design on one eye and the other lens design on the opposite eye. Subjective responses for comfort and vision, objective signs of central corneal clouding, conjunctival injection, post keratometry readings, 3-9 staining, over-refraction, post refraction and lens position were ranked and assigned to success levels for each eye. Subjects were evaluated at 1 week, 1 month, and 3 months. The first fit success rates were 92 percent for the trial fit and 86 percent for the nomogram fit. The trial fit lens attained significantly better outcomes in individual categories of comfort and over-refraction. It was noted that the lens diameters differed significantly and a large percentage of both types of lenses benefited from a slight blend and edge modification. Although trial fitting remains the method of highest success, nomogram fitting (using System 10) appears consistent enough to consider it an option for certain practice situations.
为确定试戴定制与根据列线图（系统10）选择的硬性透气性角膜接触镜之间的差异，42名受试者一只眼睛佩戴一种镜片设计，另一只眼睛佩戴另一种镜片设计。对舒适度和视力的主观反应、中央角膜混浊的客观体征、结膜充血、角膜曲率计测量读数、3-9点染色、复验、验光后和镜片位置进行排序，并为每只眼睛指定成功等级。在1周、1个月和3个月时对受试者进行评估。试戴的首次配镜成功率为92%，列线图配镜为86%。试戴镜片在舒适度和复验的各个类别中取得了显著更好的结果。值得注意的是，镜片直径存在显著差异，并且两种类型的镜片中有很大比例通过轻微的融合和边缘修饰而受益。尽管试戴仍然是成功率最高的方法，但列线图配镜（使用系统10）似乎足够一致，可以将其视为某些实际情况的一种选择。
