PMC5533570_01
Optical coherence tomography measurements.. Notes: The location of the apex of the pinguecula was determined by identifying manually the point where there is the most elevated protrusion of conjunctiva. The measurement was made to be perpendicular to the anterior surface of the sclera, that is, where there is the interface delineated by differential image reflectivity.
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Optical coherence tomography (OCT) imaging evidenced a height at the most elevated point of the pinguecula of 740 microm (Figure 1 and Table 1).
Ocular surface before and after treatment.. Notes: (On the left) Before laser photoablation, pinguecula appeared as an elevated mass on the nasal conjunctiva adjacent to the limbus. (On the right) Three months after photoablation, no residual of pinguecula was detected. (At the bottom) optical coherence tomography images show the changes pre- and post-treatment of the ocular surface contour.
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Based on response of the dry eye disease to the treatment, and according to an ex juvantibus line of reasoning, definitive diagnosis was pinguecula-related dry eye disease (Figure 2).