Solar Shield® contrast-enhancing filters are available in 3 frame sizes: Small, Medium (Oval) and Large. The small frame will fit patients who have smaller eyewear or who don’t wear eyewear at all, while the medium and large sizes will comfortably fit over a patient’s standard eyewear. Small frames [replacing Cateye] fit over Rx frames not exceeding: 5 1/2″w x 1 5/8″h – 142mm x 42mm. A = 60mm B=40mm. The amber polycarbonate lens provides medium-range blue light filtering, which is ideal for contrast enhancement and improves visual acuity. It blocks 100% UVA/UVB light and 100% visible light up to 511nm.