Which eye examination technique assesses the smoothness of the corneal surface?

The technique that assesses the smoothness of the corneal surface is specular reflection. This method involves the use of a light source to create reflections on the surface of the cornea, allowing for observation of its smoothness and topography. By examining these reflections, the examiner can discern details about the corneal surface, such as irregularities or changes that may indicate disease or damage.

In contrast, tonometry primarily measures intraocular pressure and is not focused on the surface texture of the cornea. Fundoscopy is utilized for viewing the interior structures of the eye, particularly the retina and optic nerve, and does not provide information about the corneal surface. The slit-lamp examination, while it does provide a comprehensive view of the cornea, including its surface characteristics, does so through a broad range of observations rather than specifically focusing on smoothness assessments through reflection techniques. Thus, while the slit-lamp is a valuable tool in ocular examinations, specular reflection is specifically designed for evaluating corneal smoothness.