Here at Veatch Instruments when we service a Binocular Indirect Ophthalmoscope (BIO) we don't just clean the eyepieces and send it back out. We disassemble it down to its basic components and clean them individually. When a BIO gets dropped (which happens a lot) we align the optics and replace the necessary parts, clean all the components and reassemble. Then, we use a schematic eye along with a 20D lens to make sure the field of view is crisp and fused. If you need to repair or service your Binocular Indirect Ophthalmoscope, use technicians you know you can trust.