Lighthouse ETDRS® Numbers Chart LH 9243

The Lighthouse ETDRS® Numbers Chart (LH 9243) provides standardized visual acuity measurement using numerical optotypes based on the Early Treatment Diabetic Retinopathy Study (ETDRS) protocol. It is designed for patients who are unable to read standard letter charts, including young children, multilingual populations, and individuals with limited literacy.

Commonly used in ophthalmology, low vision clinics, clinical trials, and research settings, the chart delivers precise and reproducible visual acuity measurements while supporting standardized testing across diverse patient populations.