ResultsThe clinical information was limited in many of these cases, but the great majority of conjunctival biopsies had been diagnosed either as pterygium or pinguecula (Fig. 1), though the criteria for this differentiation were not constant. There were also some patients with a clinically invasive carcinoma (Fig. 2) and a few with other lesions such as papilloma. HISTOPATHOLOGYThe main histological features and the diagnosis are shown in Tables 1 and 2; 167 lesions were reclassified as 'solar keratosis' with varying degrees of 102 on 11 May 2018 by guest. Protected by copyright.