Scientific Reports · 5 authors, 4 centres
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A randomized study compared three large-diameter multifocal contact lens designs (Proclear, SMR, Optimum) worn for 6–8 hours daily over two weeks in 40–55-year-old presbyopic adults with dry eye syndromes, finding that while some negative ocular surface and tear film changes occurred, visual function and quality were positively improved, particularly with larger-diameter, distance-center designs.
This randomized study enrolled presbyopic adults aged 40–55 with dry eye syndromes, randomly assigning them to wear one of three large-diameter multifocal contact lens designs (Proclear, SMR, or Optimum) for 6–8 hours daily over two weeks. Ocular surface health, tear quality, visual quality, and visual function were assessed before and after lens wear. While corneal staining and limbal redness worsened and tear break-up time and lipid layer thickness declined during lens wear, measured values remained within the normal range. After lens removal, lipid layer thickness, blink frequency, and contact lens tear break-up time improved significantly. The MTF of the total area ratio improved after lens wear, though high-order aberration area ratio decreased. No significant differences were found across groups for conjunctival redness, blink frequency with lenses on, or stereopsis.
