Eye scissors in ophthalmology vary in indication. See below for further details on conjunctival, enucleation, Vannas scissors, etc
Westcott’s Conjunctival scissors
Uses
To cut the conjunctiva-periotomy.
Types of conjunctival flap
Formix-based flap and limbal-based flap
Corneoscleral Extension Scissors
To extend the corneoscleral wound in ECCE/ICCE.
In ECCE the limbal wound extends from 10-20 clock position.
In ICCE the limbal wound should be larger than in ECCE, as the entire lens is being removed.
Eye scissors: Vannas
Vannas scissors Use- Multipurpose Fine scissors
To cut the anterior capsule in envelope capsulotomy
To cut the pupil in the small non-dilating pupil.
See here for the Eyelid speculum
Dewecker’s Iris scissors
Uses
Used for iridectomy.
Indication for iridectomy
Primary angle closure glaucoma
In ECCE associated with vitreous loss, in pediatric cataract surgery, ICCE
In penetrating keratoplasty
Trabeculectomy
Enucleation Scissors
Uses
To cut the optic nerve in the enucleation of the eyes.
Indication for enucleation
Retinoblastoma and malignant melanoma glaucomatous stage.
Absolute glaucoma, painful blind eye, phthisis bulbi.
Badly injured eye to decrease the risk of sympathetic ophthalmitis