Stability of Photo-Printed and Oil-Painted Irises in Ocular Prostheses Subjected to Weathering
Abstract
Introduction Iris fabrication is central to ocular prosthesis aesthetics, yet comparative evidence on oil‑painting versus photo‑printing under environmental stressors remains limited. This study evaluated colour stability, dimensional stability and objective acceptability of conventionally oil‑painted and photo‑printed irises in ocular prostheses following exposure to weathering conditions. Methods Forty ocular prostheses were fabricated, comprising 20 oil‑painted and 20 photo‑printed irises. Ocular prostheses fabricated with each method were divided into two subgroups: 10 were subjected to outdoor weathering conditions for two weeks, and 10 were maintained in a dark room as controls, yielding four experimental groups: oil-painted weathered, oil-painted non-weathered, photo-printed weathered, and photo-printed non-weathered. Colour change was quantified using CIELAB colour difference formula values in Adobe Lightroom Classic (Adobe Inc., San Jose, California, USA), and iris size was assessed with Adobe Photoshop (Adobe Inc.). A researcher‑designed questionnaire compared the acceptability of oil-painted and digitally printed irises in ocular prostheses. Results Photo-printed non-weathered prostheses demonstrated the smallest mean colour value of all other groups. Following exposure to outdoor weathering conditions, colour changes in photo-printed irises were significantly larger than those in oil-painted irises (p<0.001). Photo-printed weathered irises were significantly…
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