Perforation of globe may also occur sometimes. To prevent such catastrophy, gentle injection with blunt-tipped needle is recommended. Further, peribulbar anaesthesia may be preferred over retrobulbar block.
Spontaneous dislocation of lens in vitreous has also been reported (in patients with weak and degenerated zonules especially with hypermature cataract) during vigorous ocular massage after retrobulbar block. The operation should be postponed and further management is on the lines of posterior dislocation of lens
Microspherophakia and spontaneous inferior dislocation of a lens in a ... emedicine.medscape.com
4) Scleral disinsertion can occur due to very deep groove incision. In it there occurs complete separation of inferior sclera from the sclera superior to the incision.Scleral disinsertion needs to be managed by radial sutures.
Occur when anterior chamber is entered with a sharp-tipped instrument such as keratome or a piece of razor blade. A gentle handling with proper hypotony reduces the incidence of such inadvertent injuries.
2) Small capsulorhexis . It predisposes to posterior capsular tear and nuclear drop during hydrodissection. It also predisposes to occurrence of zonular deshiscence. Therefore, a small sized capsulorhexis should always be enlarged by 2 or 3 relaxing incisions before proceeding further.
6. Use of Flieringa ring to prevent collapse of sclera especially in myopic patients decreases the incidence of vitreous loss.
7. When IOP is high in spite of all above measures and operation cannot be postponed, in that situation a planned posterior-sclerotomy with drainage of vitreous from pars plana will prevent rupture of the anterior hyaloid face and vitreous loss.
Posterior loss of lens fragments into the vitreous cavity may occur after PCR or zonular dehiscence during phacoemulsification. It is potentially serious because it may result in glaucoma, chronic uveitis, chronic CME and even retinal detachment.
wound followed by expulsion of the lens, vitreous,
retina, uvea and finally a gush of bright red blood.
Although treatment is unsatisfactory, the surgeon should attempt to drain subchoroidal blood by performing an equatorial sclerotomy. Most of the time eye is lost and so evisceration operation has to be performed.
A bandage contact lens is typically placed over the surgical site, usually sufficient to slow the leak adequately to allow natural healing. If the leak persists, surgical measures used to repair the problem.