Use of medical filter lenses in visual rehabilitation

Medical filter lenses have emerged as an important resource in visual rehabilitation owing to their ability to block specific bands of the visible spectrum, thereby reducing discomfort and improving visual performance. Their application has demonstrated significant benefits in conditions such as achromatopsia, cone dystrophy, albinism, and red–green axis dyschromatopsia. Recent literature confirms their clinical applicability, showing positive effects on visual function, particularly through the reduction of disabling photophobia and improved contrast during reading activities. However, the absence of a universal protocol highlights the need for individualized assessment based on a comprehensive ophthalmological examination combined with testing using certified filter test boxes. Consideration of factors such as spectral properties, hue, and transmittance is essential during lens selection. A systematized adaptation method may improve prescription accuracy and guide future research on the clinical use of medical filter lenses.