Research Review: <br>Pupil Size and Multifocal Lens Performance</br>

Category	Detail
Condition	Multifocal Contact Lens Performance
Key Mechanisms	Variation in pupil size impacts the refractive power profile of multifocal lenses, affecting visual performance.
Target Population	Individuals using multifocal contact lenses for presbyopia.
Care Setting	Optometry and Vision Science

Pupil size variation significantly affects the performance of multifocal contact lenses (MFCLs).
High-contrast visual acuity shows minimal difference across pupil sizes, while low-contrast acuity reveals a 2-line difference.
Visual satisfaction with MFCLs correlates with pupillary dynamics under varying lighting conditions.
Tinted lenses can enlarge pupils but may not improve distance visual acuity.
Higher-order aberrations in MFCLs impact visual performance more with larger pupils.

Assess pupil size and dynamics when evaluating multifocal contact lens performance.

Decreased distance visual acuity may occur if light transmission is reduced below 50% with tinted lenses.

Patients with presbyopia requiring multifocal contact lenses.

Pupil size and its dynamics should be factored into the selection and management of MFCLs.

Evaluate both high-contrast and low-contrast visual acuity when assessing MFCL performance.
Utilize measures of pupillary response to optimize multifocal lens fitting.