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Contrast sensitivity function with soft contact lens wear.

Kishor Sapkota¹, Sandra Franco¹, Madalena Lira¹

¹Center of Physics, University of Minho, Braga, Portugal.

Journal of Optometry

|February 18, 2020

Summary

This summary is machine-generated.

Soft contact lenses (SCLs) improve contrast sensitivity function (CSF) compared to spectacles. Long-term SCL wear does not significantly alter CSF, indicating stable visual performance.

Keywords:

Contrast sensitivity function Frecuencia espacial Función de sensibilidad al contraste Lentillas blandas Soft contact lens Spatial frequency Spectacles wear Uso de gafas

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Area of Science:

Ophthalmology
Optometry
Vision Science

Background:

Contrast sensitivity function (CSF) is a critical measure of visual performance.
Spectacles and soft contact lenses (SCLs) are common refractive correction methods.
Understanding how SCL wear impacts CSF is essential for patient eye care.

Purpose of the Study:

To compare contrast sensitivity function (CSF) between soft contact lens (SCL) wear and spectacle wear.
To evaluate the longitudinal effect of three months of SCL wear on CSF in myopic subjects.

Main Methods:

A prospective study involving 47 myopic subjects with no prior contact lens experience.
CSF was measured using the CSV-1000 instrument with both spectacles and SCLs (daily and monthly disposable).
CSF was reassessed after three months of continuous SCL wear to determine changes.

Main Results:

CSF was significantly higher with SCLs compared to spectacles at spatial frequencies of 3, 6, and 12 cycles per degree.
No significant difference in CSF was observed between baseline and after three months of SCL wear.
No significant differences in CSF were found between different SCL materials (hydrogel vs. silicone) or wearing modalities (daily vs. monthly).

Conclusions:

Soft contact lenses offer superior contrast sensitivity compared to spectacles.
Sustained wear of SCLs for three months does not negatively impact contrast sensitivity function.