![]() ![]() Scleral flaps can then be closed with 10-0 nylon or fibrin glue. Haptics can be externalized using 25-or 27-gauge forceps or 30G-thin wall needle. Some techniques involve the use of scleral flaps or scleral tunnels parallel to the limbus. IOL haptics can be externalized and fixated within the sclera without the use of sutures. In order to avoid a blind pass through the ciliary sulcus, the suture needle can be inserted into and externalized using a hollow needle that was placed at a known landmark or by utilizing endoscopic visualization. In ab interno fixation, the suture is passed from the inside to the outside of the eye. Scleral flaps, tunnels, or grooves can be used to protect the knot and prevent external suture erosion. A hollow 27-gauge or 30-gauge needle can be used as a docking guide to ensure exit of the suture needle through the correct site in the sclera. When using prolene, the suture needle may be straight (STC-6), which provides longer range of access, or curved (CIF-4 or CTC-6), which provides a more rigid needle. ![]() 9-0 or 10-0 double-armed polypropylene suture (Prolene) can be utilized, although Gore-tex is becoming more popular. The location of the ciliary sulcus is established using external landmarks. This may be an important consideration in patients who are at increased risk of requiring retinal detachment repair or endothelial keratoplasty in the future.Ī dislocated IOL-capsule complex may also be fixated by passing the suture needle through the capsular bag.Īb externo fixation refers to scleral fixation in which sutures are passed from the outside to the inside of the eye. that are much more durable than prolene and less likely to break with suture fixation.Īs most IOL power calculations are based on endocapsular IOL localization, power adjustment is necessary to account for a more anteriorly positioned lens in the ciliary sulcus.Ĭalcification of hydrophilic acrylic IOLs (Akreos) has been reported following procedures involving intraocular gas or air. The Zeiss CT Lucia 602 is 3-piece hydrophobic acrylic IOL with polyvinylidene fluoride (PVDF) monofilament haptics. The Bausch & Lomb enVista MX60 IOL is a hydrophobic acrylic IOL that contains eyelets at the 2 haptic-optic junctions. The Bausch & Lomb Akreos AO60 hydrophilic acrylic lens contains 4 eyelets through which suture can be passed, providing 4 point fixation. The Alcon CZ70BD PMMA lens contains eyelets along the haptics that facilitate suture fixation and requires a 7 mm incision as it is not foldable. Some suture fixation techniques involve tying knots to directly to the haptic of a 1 or 3-piece IOL ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |