Thickening and calcification of the lens capsule and high pressure applied by the lens material to the capsule make it difficult to undertake capsulorhexis. A mature cataract is opaque, whether white Figure 1 or brunescent, and, therefore, has complete absence of red reflex. J Pediatr Ophthalmol Strabismus To study the efficacy and safety of 0. He has patent rights in relation to trypan blue as well as a licensing agreement with Dutch Ophthalmic Research Corporation International BV. Phacoemulsification of white hypermature cataract.
Ophthalmic Surgical Dyes: VisionBlue and MembraneBlue
In , Melles et al4 published their use of 0. In addition, trypan blue provided more persistent, longer-lasting staining of the anterior capsule Figure 2. With the intracameral subcapsular injection, the dye remained trapped in the subcapsular space in contact with the posterior surface of the anterior capsule, allowing enough time to perform any maneuver. ICG dye Akorn comes in a bottle containing 25 mg lyophilised ICG powder, with a second bottle of single use diluent. The associated instability of the anterior chamber is a concern when staining under an air bubble. With respect to efficacy, the benefit of improved visualization of the capsule is clinically obvious, but one randomized study demonstrated that better visualization improves a surgeon's ability to complete the capsulorhexis in mature cataracts. Results In all globes, CCC was uneventful using the 3 dyes and with both techniques.
CRSToday | Trypan Blue Versus Indocyanine Green
Left, the empty capsular bag with the split capsule; right, end of the procedure with a well-fixated posterior chamber lens in the ciliary sulcus. Through the paracentesis, the air is then exchanged for BSS, which is used to irrigate the dye out of the anterior chamber. J Pediatr Ophthalmol Strabismus. Wakabayashi T, Yamamoto N.
Trypan Blue Versus Indocyanine Green
Description: A prospective study on trypan blue capsule staining under air vs under viscoelastic. Both ICG and trypan blue have been safely and successfully used to enhance visualization of the anterior capsule. Unlike ICG, there is no particulate suspension with trypan blue, and it is much more convenient to use because there is no mixing involved. Chang et al J Cataract Refract Surg.