The production of aqueous tears is evaluated in various ways. The Schirmer test is performed by placing a thin strip of filter paper in the lower conjunctival sac. The length of the wet portion of the strip is measured to quantify aqueous tear production. The Schirmer test determines whether the eye produces enough tears to […]
Specular microscopy allows us to study the corneal endothelium. Since the cellular distribution is nearly uniform, this technique determines the number, shape, and size of the endothelial cell population. Specular microscopy provides a reflected image of the optical interface between the corneal endothelium and the aqueous humor, but it can also be used to obtain
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Aberrometry allows us to analyze the optical properties of the cornea based on its morphology. The study of corneal aberrations has multiple applications in ophthalmology, including assessing the optical quality of both normal and pathological corneas, selecting intraocular lenses based on corneal spherical aberration, and applying personalized treatments with excimer laser guided by corneal aberrometry.
Axial length is the distance from the corneal vertex, on the epithelial side, to the retinal foveola along the visual axis. It is essential to determine this measurement whenever an intraocular lens is calculated after removing an optical element from the eye. A refractive error in axial length measurement can have a significant impact, especially
