Binocular Indirect ophthalmoscope (BIO) is used to examine the interior structure of the eye, the same way as hand held ophthalmoscope does. The only different is with BIO(indirect ophthalmoscope), the Ophthalmologists and Optometrists wears it on his/her head, so this allows the doctor to have both hand free to examine the eyes.
 Heine Indirect Ophthalmoscope |
 Welch Allyn Indirect Ophthalmoscope |
 Keeler Indirect Ophthalmoscope |