The effects of gravitational lensing on the samples of z~4.3 and z>5.8 quasars recently published by the Sloan Digital Sky Survey will be discussed. The main finding is that the lensing probability should be 1-2 orders of magnitude higher than for conventional surveys. I will discuss the multiple imaging rate, the distribution of magnifications expected in the quasar samples, and the contribution of lens galaxy light to the Gunn-Peterson trough. Furthermore I will describe the expected microlensing variability of the continuum region and emission-line equivalent widths of lensed quasars.