Final answer:
The results of a laser-ray tracing optometer can be affected by factors such as drawing accuracy during ray tracing, precision of the given information used in the thin lens equations, and the accuracy of the laser used in the optometer.
Step-by-step explanation:
The results of a laser-ray tracing optometer can be affected by several factors. One factor is the accuracy with which you can draw during ray tracing. Another factor is the precision of the given information used in the thin lens equations. Additionally, the accuracy of the laser used in the optometer can also impact the results.