Monovision contact lens fitting involves determining the appropriate lens power for each eye to optimize vision at different distances. Typically, one eye, usually the dominant eye, is corrected for distance vision, while the other eye is corrected for near vision. This approach aims to reduce the need for reading glasses in individuals experiencing presbyopia. The process involves a comprehensive eye examination to assess refractive error, ocular dominance, and overall eye health. Trial lenses are used to simulate the monovision effect, allowing the patient to experience and evaluate their vision at various distances. For example, if a patient’s right eye is dominant and requires a +1.00 diopter correction for distance and the left eye requires a +2.50 diopter correction for near, the initial trial lenses would reflect these values.
Precise power determination is important for successful adaptation and patient satisfaction. The appropriate correction improves functional vision, enhancing the ability to perform daily tasks such as reading, driving, and using digital devices. The concept has evolved over time to include modified monovision approaches, which may utilize multifocal contact lenses or a slight under-correction of the non-dominant eye to improve intermediate vision and binocularity. Ultimately, a well-calculated monovision correction enhances overall visual comfort and reduces dependence on additional spectacles, leading to a better quality of life for presbyopic individuals.
