Anterior segment OCT (AS-OCT) imaging characteristics in cases of uveitis

AS-OCT features of two anterior uveitis cases are described. Case 1: [Fig. 1a] Iris pigments on anterior lens capsule appeared as bright hyperreflective lesions with backshadowing [Fig. 1b], and inferior fibrin appeared as a horizontal homogenous hyperreflective lesion [Fig. 1c]. Sunray-like artifact is denoted by asterisk sign at the edge of pupillary border.Figure 1: (a) Case 1 slit-lamp photograph depicting the presence of iris pigments on anterior lens capsule (mustard arrow) and inferior fibrin (yellow arrow), which on anterior segment optical coherence tomography (AS-OCT) appeared as a bright hyperreflective lesion with backshadowing ((b) mustard down arrow) and as a homogenous hyperreflective lesion in the anterior segment cavity ((c) yellow arrow). (d) Case 2 slit-lamp photograph depicting the presence of keratic precipitates on anterior lens capsule (mustard arrow) and inferior berlin nodule (yellow arrow), which on anterior segment optical coherence tomography (AS-OCT) appeared as a dull hyperreflective lesion with less prominent backshadowing ((e) mustard down arrow) and as a heterogenous hyperreflective lesion in anterior segment cavity ((e) yellow arrow) with central vacuoles-like appearanceCase 2: Keratic precipitates appeared as round, blobby dull hyperreflective lesions with indistinct backshadowing and the iris nodule as a heterogenous structure with central vacuoles [Fig. 1d and e]. Keratic precipitates have dull hyperreflectivity and backshadowing compared to iris pigments, which have bright hyperreflectivity on AS-OCT. Financial support and sponsorship: Nil. Conflicts of interest: There are no conflicts of interest.