Một trong những xét nghiệm phổ biến hơn là các kiểm tra lỗ (8), mà bệnh nhân được yêu cầu để hình thành nên một đối tượng nằm ở một khoảng cách trung gian từ anh ta hoặc cô với một hình tam giác được tạo ra bởi cánh tay dang ra của mình trong khi vẫn giữ cả hai mắt mở người. | 194 Azar et al. The most commonly used approach however is determining which eye is the dominant eye and correcting that eye for the most commonly used viewing distance 11 which is generally considered to be the far distance. The dominant eye has been shown to be superior for spatial-locomotor tasks such as walking running or driving a car 2 20 . Blur suppression appears to be greater when the dominant eye is corrected for the most commonly used distance . far 3 . Correcting the dominant eye for distance also produces less esophoric shifts 21 . The dominant eye is generally identified by use of sighting dominance tests 22 . One of the more common tests is the hole test 8 for which the patient is asked to frame an object that lies at an intermediate distance from him or her with a triangle created by his or her outstretched arms while keeping both eyes open. The eye that is in alignment with the object and the hole is considered the dominant eye. I. CROSSED MONOVISION Crossed monovision occurs when the nondominant eye is corrected for distance and the dominant eye for near. This can happen either accidentally or intentionally 1 . Crossed monovision may be the intended goal when for example a contact lens monovision trial demonstrates better visual function if the nondominant eye is corrected for distance. A patient may also change his or her mind regarding monovision versus full distance correction for both eyes after the nondominant eye has already been treated for distance and the dominant eye has not yet been treated. Patients who wish to have only one eye treated and who are markedly more myopic in the nondominant eye may elect to have the nondominant eye corrected for distance 1 3 . Unintentional crossed monovision can occur when correction in the dominant eye is less than expected in patients requesting full distance correction for both eyes. Conversely in patients desire equivalent undercorrection in both eyes an overcorrection in the nondominant eye can .
