Slit Lamp Adapter for iPhone 6 / 6s with Built-In 10x Eyepiece and 3 sleeves with different diameters for exact fitting. Ocular / Eyepiece Smartphone adapter for Slit Lamps and Microscopes will fit almost every instrument in the market with the INCLUDED 3 SLEEVES included 3 sleeves for different diameters Made with ULTRA-DURABLE Polycarbonate Plastic. 1 year full warranty. Take High Quality Anterior Pictures and SHARE INSTANTLY via email, text, chat, dropbox, etc. Posterior photography is possible with diagnostic lens. FAST AND EASY TO SETUP COMPATIBLE WITH MOST OF THE SLIT LAMPS using the Included 3 sleeves with this diameters: Adapter: 23.5 mm Sleeve 1: 25 and 28 mm Sleeve 2: 27 and 30.5 mm Sleeve 3: 29 and 30 mm.