Ophthalmologists estimate anterior chamber depth by measuring the angle between which two structures?

The estimation of anterior chamber depth is primarily determined by measuring the angle between the anterior surface of the iris and the posterior surface of the cornea. This angle is crucial as it informs ophthalmologists about potential risks for conditions such as glaucoma, where narrow angles can lead to angle-closure events.

By focusing on the anterior surface of the iris and the posterior surface of the cornea, practitioners can accurately assess the space within the anterior chamber, which is essential for understanding the eye's overall health and function. A wider angle typically suggests a deeper anterior chamber, whereas a narrower angle indicates a shallow anterior chamber, posing greater risk for complications.

The other choices do not directly relate to the critical assessment of the anterior chamber depth or the angle necessary for this measurement.