This study compared how well two sodium hyaluronate viscoelastics main
tained the anterior chamber during cataract surgery in eyes at risk fo
r high vitreous pressure. Patients were divided into two groups based
on the sodium hyaluronate used: Healon(R) or Healon GV(R). Qualitative
data were obtained with a digital slide gauge attached to the operati
ng microscope. After capsulorhexis, mean anterior chamber depth (dista
nce of the corneal apex to the iris plane) was significantly greater i
n the Healon GV group (P = .0012). Subjective intraoperative evaluatio
n by surgeons also favored Healon GV. There was no difference between
the groups in postoperative inflammation, corneal edema, intraocular p
ressure, or visual acuity. Therefore, although the two viscoelastics a
re equally safe, Healon GV maintains the anterior chamber better durin
g cataract surgery.