An evaluation of contrast sensitivity function with optical filters, myopia control spectacles and contact lenses in myopes

Short-sightedness (myopia) is a very common condition where close objects are clear but distant ones are blurry. This study tests whether special optical filters, myopia control spectacles, or contact lenses affect contrast sensitivity — which is your ability to distinguish fine details and subtle differences in shading. Contrast sensitivity is an important measure of visual quality beyond just how sharp your vision is. Participants will try different lens and filter designs and have their contrast sensitivity measured under different conditions, then compared to standard single-vision lenses. This study is helping to evaluate up to 30 different prototype designs, with up to 20 participants testing each design. You may be eligible if you are a healthy adult aged 18 or older with myopia (short-sightedness) and astigmatism of 2.00 D or less in each eye, whose vision can be corrected to at least 6/7.5 with glasses or contact lenses. People with strabismus (eye misalignment), amblyopia, significant eye conditions, recent eye surgery, or pregnancy are not eligible.