Patients wearing monovision contacts may have difficulty with:

Patients wearing monovision contacts, a method often used to correct presbyopia, have one eye corrected for distance vision and the other for near vision. This approach can lead to difficulties in tasks requiring binocular vision, such as depth perception.

When a person relies on each eye for different visual tasks, they may struggle with tasks that necessitate precise visual acuity with both eyes working together, particularly aided monocular visual acuities. Each eye may not provide the same visual clarity when viewed separately, as the brain must adjust to the different prescriptions. The adaptation can make it harder for patients to perform certain visual tasks, especially when they need to switch between near and far vision quickly.

Adjustments and adaptations in monovision take time, and patients may not achieve the expected visual acuity with both eyes during aided assessments, as they might not be used to relying on one eye for distance and the other for near tasks. Thus, enhanced focus and adjustments to visual habits are often needed, which can contribute to difficulties in measuring visual acuities effectively under these conditions.