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A prospective study on trypan blue capsule staining under air vs under viscoelastic
V W Y Wong1, T Y Y Lai, G K Y Lee
1Department of Ophthalmology and Visual Science, The Chinese University of Hong Kong, Hong Kong, Hong Kong SAR.
Eye (London, England)
|August 13, 2005
Summary
Trypan blue capsule staining is safe and effective for white cataract surgery, whether performed under air or viscoelastic. Both methods yielded similar visual acuity and corneal health outcomes.
Area of Science:
- Ophthalmology
- Surgical Techniques
- Cataract Surgery
Background:
- White mature cataracts pose surgical challenges.
- Accurate visualization of the anterior lens capsule is crucial for safe phacoemulsification.
- Trypan blue staining is a common technique to enhance capsule visualization.
Purpose of the Study:
- To compare the safety and effectiveness of trypan blue staining under air versus viscoelastic.
- To evaluate visual acuity, corneal health, and surgical outcomes.
Main Methods:
- 52 patients with white mature cataracts were randomized into two groups: trypan blue staining under air or viscoelastic.
- Perioperative best-corrected visual acuity (BCVA), central corneal thickness (CCT), and endothelial cell density (ECD) were assessed.
- Operating time, phacoemulsification time, staining pattern, and complications were recorded.
Main Results:
- No significant differences in baseline characteristics were observed between the groups.
- At 3 months post-surgery, median BCVA improved to 0.8 in both groups.
- Mean CCT returned to baseline by 1 month, with an average ECD loss of 11.9% at 3 months, showing no significant group differences.
Conclusions:
- Trypan blue staining under air or viscoelastic are equally safe and effective for phacoemulsification of white mature cataracts.
- Both methods demonstrate comparable outcomes regarding visual recovery and corneal integrity.