This study is exploring how our brains process vision as we age and whether a technique called high definition transcranial electrical current stimulation (HD-tACS) can improve age-related vision changes. HD-tACS is a low-intensity, safe, noninvasive method that uses electrical currents applied to the scalp to gently adjust brain activity. Researchers want to see if changes in brain wave patterns, specifically alpha-gamma coupling, contribute to vision problems in older adults. The study aims to use HD-tACS to restore these brain wave patterns to a preferred state, hoping to improve your vision. We are looking for 240 participants aged 18 and older with normal or corrected-to-normal vision. The study will measure changes in your ability to see contrast and 3D shapes.

Study design

This is an interventional study with a planned enrollment of 240 participants. It involves two separate five-day, double-blind, sham-controlled studies.

What's involved

You would participate in two five-day studies. During each study day, your vision will be tested before and immediately after receiving the stimulation.

Compensation

Not stated in the trial record.

Follow-up

Your vision will be measured at baseline (before stimulation) and immediately after stimulation on each of the five study days.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.