Ophthalmology – Chairs Dexta’s Ophthalmology Chairs have set the standard for over 50 years. They’re available in a wide range of styles to suit each Doctor’s need.Lasik & Cataract Eye Surgery ChairsDexta Corporation is proud to introduce you to their newest innovation – the EXTO chair. The EXTO chair was designed to fill the growing need of doctors for a safe and stable Lasik surgery platform – with easy patient access and exit.The EXTO chair is the first chair that enables the physician to blend the Femto and Excimer lasers together – into one smooth operation.