Does the Badal optometer stimulate accommodation accurately?

作者：Aldaba Mikel^*; Otero Carles; Pujol Jaume; Atchison David A

来源：Ophthalmic and Physiological Optics, 2017, 37(1): 88-95.

DOI：10.1111/opo.12334

• accommodation
• Badal optometer
• closed-view
• instrument accommodation
• open-view
• real space

Purpose: To study whether the accommodation response to Badal optometer is equivalent to the response for real space targets.
Methods: Accommodative responses were measured for 28 young eyes with the WAM-5500 autorefractometer in eight configurations for 0.17 D, 2.0 D and 5.0 D accommodation stimuli. Parameters that might contribute to differences in response were systematically isolated: stimulation method (real space vs Badal targets), field of view, instrument's cover proximity, the looming effect, and the peripheral interposition of objects in depth.
Results: Mean accommodative response differences between a natural view configuration and a configuration with a Badal Optometer were 0.50 +/- 0.43 D and 0.58 +/- 0.53 D for 2.0 D and 5.0 D stimulation, respectively (p < 0.001), with accommodation lags for the latter condition. Of the isolated parameters that might contribute to these differences, varying the interposition of objects in depth affected accommodation response more markedly.
Conclusions: It is likely that Badal optometers affect accommodation through a combination of some or all of the studied parameters. We conclude that accommodation response to closed-view Badal optometers is not equivalent to real space target response.

• 出版日期2017-1