ophthalmology instruments
DESCRIPTION
These are the common instruments used in ophtlalmology. Questions on these are asked in the exams for undergraduates.TRANSCRIPT
![Page 1: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/1.jpg)
Wire speculum
Used to retract lid and hold eye open in1.Both intraocular and
extraocular surgery• Removal of conjunctival
and corneal foreign body
• Cauterisation of corneal vessels
• Examination of patient with blepharospasm
![Page 2: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/2.jpg)
Superior rectus forceps
• Used to hold the superior rectus while placing bridle suture
![Page 3: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/3.jpg)
Conjunctival scissors
• A spring action scissor with curved end and large blades
• Used for peritomy
![Page 4: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/4.jpg)
Bard parker knife
• To load no.15 blade with round tip for corneoscleral groove in ECCE and first step in triplanar incision of SICS
![Page 5: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/5.jpg)
Cystitome
• Used in anterior capsulotomy and capsulorrhexis
![Page 6: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/6.jpg)
Corneoscleral scissors
• Spring action scissor • Used to enlarge
corneoscleral incision for ECCE
![Page 7: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/7.jpg)
Fine cannula
• For hydrodissection and intraocular irrigation using balanced salt solution.
![Page 8: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/8.jpg)
Iris repositor
1.To reposit iris in any intraocular surgery
2.To break synechiae at the pupillary margin
![Page 9: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/9.jpg)
Lens hook
1.To apply pressure at 6 ‘o clock position over the limbus
2.Can be used as a muscle hook
![Page 10: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/10.jpg)
Needle holder
1. Spring action2. Used to pass sutures in
conjunctiva, cornea, sclera and extraocular muscles
3. Castoviejo’s-used in extraocular muscle surgery
![Page 11: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/11.jpg)
Corneoscleral forceps
• Toothed forceps • Used to hold cornea
and sclera during corneoscleral suturing
![Page 12: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/12.jpg)
McPherson’s forceps
1.Used in tying suture• Used to hold superior
haptic of IOL during placement
• Used to tear off anterior lens capsule during ECCE
![Page 13: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/13.jpg)
Vanna’s scissors
1. To cut 10 - 0 nylon sutures
2. To cut anterior lens capsule in ECCE
3. To cut the iris tissue during trabeculectomy
4. For sphincterotomy5. To perform iridectomy6. To cut pupillary
membrane and lamellar corneal tissue
![Page 14: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/14.jpg)
Punctum dilator
• To dilate punctum and canaliculi during syringing, probing, DCR, DCT.
![Page 15: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/15.jpg)
CAT’S PAW RETRACTOR
1.Fork like instrument with terminal tent inward
• Used to retract skin in lacrimal sac and lid surgery
![Page 16: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/16.jpg)
Lacrimal sac dissector and curette
• For blunt dissection of lacrimal sac during lacrimal sac surgery
• Curetting remnants of lacrimal sac during daryocystectomy.
![Page 17: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/17.jpg)
Chisel and hammer
1.Chisel is used to cut bone in DCR and orbitotomy
2.Used to hammer the chisel
![Page 18: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/18.jpg)
Periosteum elevator
• Used to elevate periosteum in DCR
![Page 19: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/19.jpg)
Bone punch
Used to enlarge bony opening in DCR by punching bone from margins of opening
![Page 20: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/20.jpg)
Chalazion clamp
• To fix the chalazion and achieve hemostasis during incision and curettage
![Page 21: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/21.jpg)
Chalazion curette
1.Small cup with sharp margins attached to a narrow handle
• Used to scoop out contents of a chalazion
![Page 22: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/22.jpg)
Optic nerve guide
• Used to engage the optic nerve during enucleation
![Page 23: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/23.jpg)
Optic nerve cutting scissors
• Scissor with curved ends.
• Used during enucleation for cutting optic nerve.
![Page 24: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/24.jpg)
Descemarre’s lid retractor
1. To retract lids for examination of eyeball in children, blepharospasm, swelling of eyelids and chemosis
2. Removal of corneoscleral sutures
3. Removal of corneal foreign body
4. Double eversion of upper eyelid
![Page 25: Ophthalmology Instruments](https://reader036.vdocuments.us/reader036/viewer/2022081415/5524d4e15503467c6f8b456c/html5/thumbnails/25.jpg)
Metal cannula
• Fine canula 27G or 30 G• Used 1. To form anterior chamber• For hydro-dissection• For aspirating air, lens
matter(j-shaped cannula)