Potential range of clear vision in monovision

Area of Science:

• Ophthalmology
• Optometry
• Vision Science

Background:

• Presbyopia, an age-related condition, reduces the eye's ability to focus on near objects.
• Monovision contact lenses are a common treatment, but intermediate vision correction is a challenge.
• Compromising distance or near vision can limit the effectiveness of monovision correction.

Purpose of the Study:

• To predict the range of clear vision achievable with monovision contact lenses.
• To evaluate the impact of intermediate correction on visual acuity in monovision.
• To assess the feasibility of incorporating intermediate vision correction without compromising distance or near vision.

Main Methods:

• A simple predictive model was developed.
• Standard prescription strategies for the addition (add) power were utilized.
• Conservative estimates for the eye's static depth of focus were incorporated.

Main Results:

• The model predicted the range of clear vision for monovision lenses.
• For additions up to 2 diopters (D), minimal compromise in visual acuity was observed.
• This held true across various gaze positions.

Conclusions:

• Monovision contact lenses can potentially provide adequate vision across multiple distances.
• The addition power in monovision prescriptions can be managed up to 2D with limited visual compromise.
• This suggests a viable approach for managing presbyopia with contact lenses.