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This study compared how well two sodium hyaluronate viscoelastics maintained the anterior chamber during cataract surgery in eyes at risk for high vitreous pressure. Patients were divided into two groups based on the sodium hyaluronate used: Healon or Healon GV. Qualitative data were obtained with a digital slide gauge attached to the operating microscope. After capsulorhexis, mean anterior chamber depth (distance of the corneal apex to the iris plane) was significantly greater in the Healon GV group (P = .0012). Subjective intraoperative evaluation by surgeons also favored Healon GV. There was no difference between the groups in postoperative inflammation, corneal edema, intraocular pressure, or visual acuity. Therefore, although the two viscoelastics are equally safe, Healon GV maintains the anterior chamber better during cataract surgery.
Caporossi et al. (Wed,) studied this question.