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  • Title: Soft and hard contact lenses worn in combination.
    Author: Polse KA, Decker MR, Sarver MD.
    Journal: Am J Optom Physiol Opt; 1977 Oct; 54(10):660-5. PubMed ID: 605921.
    Abstract:
    Each of 5 subjects with normal corneas was fitted with a Bausch & Lomb F3-series Soflens contact lens and with an experimental F3-series ultrathin Soflens. A best-fit PMMA lens was worn in combination with each of the soft lenses. In addition, a best-fit CAB lens and a tight PMMA lens were separately worn in combination with the ultrathin soft lens. Each of 3 subjects with keratoconus was fitted with an ultrathin soft lens combined with a PMMA lens. For the normal corneas, the combination that produced the least corneal edema after 5 hr was an ultrathin soft lens with either a PPM or CAB lens of best fit. Two of the 3 keratoconic subjects were able to wear their contact lens combination for the 5-hr test period; corneal swelling was 1.7% and 5.3% For all subjects, acuity with a combination co ntact lens system was better than with a soft or hard lens alone.
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