Effect of blue staining of expandable hydrophilic intraocular lenses on contrast sensitivity and glare vision

Trypan blue dye for anterior segment surgeries

Use of vital dyes in ophthalmic surgery has gained increased importance in the past few years. Trypan blue (TB) has been a popular choice among anterior segment surgeons mainly due to its safety, ease of availability, and remarkable ability to enable an easy surgery in difficult situations mostly related to visibility of the targeted tissue. It is being used in cataract surgery since nearly a decade and its utilization has been extended to other anterior segment surgeries like trabeculectomy and corneal transplantation. This review will discuss the techniques and outcome of TB dye-assisted anterior segment surgeries.

Intraocular lens staining associated with Prosed/DS

A 59-year-old pseudophakic woman with a history of Prosed/DS use demonstrated a discolored Tecnis Z9001 (AMO) silicone intraocular lens (IOL). Polymethyl methacrylate (PMMA), hydrophobic acrylic, silicone, and Collamer IOLs were submerged in a physiologic concentration of methylene blue at 35 degrees C for 8 weeks and evaluated. No staining was noted in PMMA or hydrophobic acrylic IOLs, variable staining was noted in silicone IOLs, and intense staining was noted in Collamer IOLs. This is the first report of IOL staining with systemic use of methylene blue and of Collamer lens staining characteristics.

[Trypan blue capsule staining for phacoemulsification in white cataract]

OBJECTIVE

To study the results of phacoemulsification in eyes with white cataract using trypan blue for capsule staining.

PATIENTS AND METHODS

Thirty patients who had white cataract were included in this prospective study. They had phacoemulsification and continuous curvilinear capsulorhexis using trypan blue. Intraoperative problems related to capsulorhexis and phacoemulsification as well as postoperative outcomes where analyzed. Postoperative examinations were done at 1 day, 1 week, and 1, 3, 6, and 12 months. The mean follow-up was 10 months.

RESULTS

Complet capsulorhexis was achieved in 26 cases. Intraoperative complications included incomplet capsulorhexis in four cases (13.3%) and conversion to a conventional extraction technique in two cases. There were no cases of posterior capsular tear. Twenty-eight eyes (93.3%) had a final best corrected visual acuity at 8/10 or better. Postoperative complications included moderate transient corneal edema in six cases (20%) and iritis in three cases (10%). There were no complications related to the use of trypan blue.

CONCLUSION

Phacoemulsification using trypan blue was safe and effective in managing white cataract and had a high success rate.