Size optimization of ocular implant and prosthesis using ultrasonography.For production of the ocular implant, the longest diameter of the eyeball was measured (A, white dot line). The implant size along the X, Y, and Z axes was determined to be 75% of its length. For the prosthesis, the length along the X-axis was the length of the eye that passes through the diameter of the lens in the transverse plane of the ultrasound (B, red dot line). The length along the Z-axis was measured from the cornea to the posterior lens capsule (C, yellow dot line).