Gräf M, Dietrich H
Augenklinik für Schielbehandlung und Neuroophthalmologie, Justus-Liebig-Universität Giessen.
Klin Monbl Augenheilkd. 1994 Feb;204(2):98-104. doi: 10.1055/s-2008-1035505.
Recently, a method of objective Vernier acuity testing using a modified Catford drum was presented. A tight correlation between the objective Vernier acuity and the Snellen acuity was reported (Hopkisson et al. 1991).
In 41 cooperative patients with strabismic amblyopia and 20 normal subjects were compared the subjective Landolt acuity with the objective Vernier acuity and the individual interocular differences of the objective Vernier acuity. The Vernier method was then tested in 44 healthy 6- to 36-months-old infants. In 39 of the amblyopic and 15 of the normal subjects we compared the Landolt acuity with the grating acuity as measured with the Teller-acuity-card-test, and the interocular differences of the grating acuity. The Vernier target was a black line with an offset of one fifth of its thickness. In a distance of 1 m the offset appeared under visual angles of 15.9' to 0.3' corresponding to acuities of 0.06 to 3.2. The line was moving back and forth in its longitudinal direction. The objective Vernier acuity was defined by the smallest offset causing pursuit eye movements.
Strabismic amblyopia was detected by the Vernier method with a sensitivity of 54%. In infants, however, the sensitivity would be less than 30%. In both eyes only 45% of the infants could be tested at all. The sensitivity of the Teller-acuity-card-test was 28%.
Many cases of strabismic amblyopia will escape detection by the described method of Vernier acuity testing.
最近，有人提出了一种使用改良的卡特福德鼓进行客观游标视力测试的方法。据报道，客观游标视力与斯内伦视力之间存在紧密关联（霍普金森等人，1991年）。
对41例合作的斜视性弱视患者和20名正常受试者的主观兰多尔特视力与客观游标视力以及客观游标视力的个体眼间差异进行了比较。然后，对44名6至36个月大的健康婴儿进行了游标法测试。在39例弱视患者和15名正常受试者中，我们比较了兰多尔特视力与用泰勒视力卡片测试测量的光栅视力以及光栅视力的眼间差异。游标目标是一条黑线，其偏移量为线宽的五分之一。在1米的距离处，偏移对应的视角为15.9'至0.3'，相当于视力为0.06至3.2。线条在其纵向方向上来回移动。客观游标视力由引起追踪眼球运动的最小偏移量定义。
用游标法检测斜视性弱视的灵敏度为54%。然而，在婴儿中，灵敏度将低于30%。在双眼，只有45%的婴儿能够进行测试。泰勒视力卡片测试的灵敏度为28%。
许多斜视性弱视病例将无法通过所述的游标视力测试方法检测出来。
