# The impact of various daily disposable contact lens materials on contrast sensitivity

## TL;DR

This study found that different daily disposable contact lens materials affect how well people see contrast in both bright and dim lighting.

## Contribution

The study compares the impact of three specific contact lens materials on contrast sensitivity under different lighting conditions.

## Key findings

- Senofilcon A improved contrast sensitivity more than kalifilcon A at 12 cpd under bright light.
- Kalifilcon A and senofilcon A outperformed verofilcon A in mesopic conditions at specific frequencies.
- No significant differences were found in tear film stability across the lens types.

## Abstract

This study aimed to compare the effects of three different daily disposable
contact lens materials on contrast sensitivity.

The participants were aged 18-45 years, with spherical equivalent refraction
between -0.50 D and -6.00 D, astigmatism below 0.75 D, and best contact
lens-corrected visual acuity of 0.0 logMAR or better. Each patient was
fitted binocularly with three daily disposable contact lenses made of
different materials on three separate examination days. These materials were
kalifilcon A, senofilcon A, and verofilcon A. The contrast sensitivity of
each patient was recorded at spatial frequencies of 3, 6, 12, and 18 cycles
per degree (cpd) under photopic (85 cd/m2) and mesopic (3
cd/m2) conditions.

The current study comprised 72 eyes of 34 female and two male patients. The
mean age of the participants was 25.63 (± 0.80) years. Under photopic
conditions, the participants’ contrast sensitivity was significantly better
with senofilcon A than with kalifilcon A at a frequency of 12 cpd (p=0.008).
Under mesopic conditions, participants’ contrast sensitivity was
significantly higher with kalifilcon A than verofilcon A at 3 cpd (p=0.001),
and with senofilcon A than verofilcon A at 12 cpd (p=0.004). The pre-lens
non-invasive break-up times did not differ significantly between the three
daily disposable contact lenses (p>0.05).

In both photopic and mesopic lighting conditions, the participants in this
study exhibited differences in contrast sensitivity when wearing three
different daily disposable contact lens types, despite similar visual acuity
and pre-lens tear film stability results in their clinical evaluations.
These findings demonstrate the potential for subjective visual complaints
arising from variations in the contrast sensitivity achieved by different
daily disposable contact lenses.