Which tool allows the examination of the interior of the eye, specifically the retina?

The ophthalmoscope is a vital instrument used to examine the interior structures of the eye, particularly the retina. This handheld device has a light source and a set of lenses that enable a clear view of the back of the eye. Through the ophthalmoscope, a clinician can observe the optic disc, blood vessels, and retinal surface, which are essential for diagnosing conditions like diabetic retinopathy, glaucoma, and macular degeneration.

When using an ophthalmoscope, the practitioner can look through the pupil to directly visualize the retina and assess its health. This ability to examine the interior of the eye makes it an indispensable tool during routine eye exams and diagnostic assessments. Other tools, while useful in their respective functions, do not provide the same level of direct visualization of the retina.