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The anterior surface roughness of seven factory new rigid gas permeable (RGP) contact lenses has been studied by interferential shifting phase microscopy (ISPM) and scanning electron microscopy (SEM). Five lenses were fluorsilicone acrylate and two lenses were silicone acrylate. Their material Dk ranged from 14 to 210.ISPM is shown to be a reliable and non-destructive method to observe and measure...
A 43-year-old woman came in for an examination complaining of cloudy vision with her best optical correction, especially OD. She also complained of headaches in the left frontal regional late in the afternoon and had developed serious problems at work. The diagnosis was anterior corneal stroma scarring, OU, from PRK surgery.
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