What is the Crystalens HD? The first and only FDA-approved “accommodating” intraocular lens, the Crystalens HD automatically moves forward and backward with the eye’s internal ciliary muscle to help patients with lens implants focus naturally at all distances. In conventional lens implant surgery, which has been the standard treatment for cataracts for many years, the surgeon implants a fixed focus plastic or silicone artificial lens. This lens allows patients to see well at a distance but still requires glasses for …