Uniocular and binocular fields of rotation measures: Octopus versus Goldmann

作者：Rowe Fiona J^*; Hanif Sahira

来源：Graefes Archive for Clinical and Experimental Ophthalmology, 2011, 249(6): 909-919.

DOI：10.1007/s00417-010-1596-2

• Uniocular ductions
• Field of binocular single vision
• Octopus perimetry
• Stimulus speed

To compare the range of ocular rotations measured by Octopus versus Goldmann perimetry.
Forty subjects (20 controls and 20 patients with impaired ocular movements) were prospectively recruited, age range 21-83 years. Range of uniocular rotations was measured in six vectors corresponding to extraocular muscle actions: 0A degrees, 67A degrees, 141A degrees, 180A degrees, 216A degrees, 293A degrees. Fields of binocular single vision were assessed at 30A degrees intervals. Vector measurements were utilised to calculate an area score for the field of uniocular rotations or binocular field of single vision. Two test speeds were used for Octopus testing: 3A degrees/ and 10A degrees/second.
Test duration was two thirds quicker for Octopus 10A degrees/second than for 3A degrees/second stimulus speed, and slightly quicker for Goldmann. Mean area for control subjects for uniocular field was 7910.45 degrees(2) for Goldmann, 7032.14 for Octopus 3A degrees/second and 7840.66 for Octopus 10A degrees/second. Mean area for patient subjects of right uniocular field was 8567.21 degrees(2) for Goldmann, 5906.72 for Octopus 3A degrees/second and 8806.44 for Octopus 10A degrees/second. Mean area for left uniocular field was 8137.49 degrees(2) for Goldmann, 8127.9 for Octopus 3A degrees/second and 8950.54 for Octopus 10A degrees/second. Range of measured rotation was significantly larger for Octopus 10A degrees/second speed.
Our results suggest that the Octopus perimeter is an acceptable alternative method of assessment for uniocular ductions and binocular field of single vision. Speed of stimulus significantly alters test duration for Octopus perimetry. Comparisons of results from both perimeters show that quantitative measurements differ, although qualitatively the results are similar. Differences per mean vectors were less than 5A degrees (within clinically accepted variances) for both controls and patients when comparing Goldmann to Octopus 10A degrees/second speed. However, differences were almost 10A degrees for the patient group when comparing Goldmann to Octopus 3A degrees/second speed. Thus, speed of stimulus must be considered if wishing to use these perimeters interchangeably.

• 出版日期2011-6