👉 Sigmoidoscopy is a medical procedure that involves using an instrument to examine and diagnose certain types of eye problems. It is commonly used in ophthalmology, which is a branch of medicine that focuses on the study of the eyes and their functions. In a sigmoidoscopy, a small probe (called a "sagittal" or "horizontal") is inserted into the cornea at an angle to allow for better visualization of the inner eye. The probe is then rotated in a circular motion
