comprehensive detailed insight in options available for viewing system in vitrectomy and retina surgery especially in asia

2. Viewing systems in
VR surgery
DR ABHISHEK GHELANI MS
SHANTI SAROJ NETRALAY

3. Conventional contact lens system
 Planoconcave, field 20’
 Biconcave 30’
 Prismatic lenses 60’
 Direct erect image, no need for inverter

4. Sutured lens
Landers lens system

6. self-retaining contact lens
 standard Machemer plano-concave (−60 diopters) onepiece acrylic lens
with four footplates

7. Wide angle viewing systems
 based on the principle of binocular indirect ophthalmomicroscopy
 contact and noncontact mode
Non contact viewing Contact viewing
Advantages
• assistant is not required
• no intraoperative corneal trauma
• provides a good view during air-fluid
exchange and in patients with steep corneas
and small pupils
Advantages
• image resolution and stereopsis are superior
• field of view is also wider
Disadvantages
• Poor view in patients with corneal trauma
• Need an assistant

9. ROLS (reinverting operating lens system)
OIVS (ocular inverter vitrectomy system)

10. Non contact systems
 BIOM(binocular indirect ophthalmo microscope)

12. Non contact systems
 optical fiber-free intravitreal surgery system by Topcon (OFFIS)
 can see the fundus with illumination incorporated into the microscope
without using a light probe
 Working distance from the cornea is more
 cannot be adapted to other microscopes
 40 D 50’
 80 D 70’
 120 D130’

13. Non contact systems
 From ocular OSVS (ocular sergical viewing system)
 The Peyman-Wessels-Landers 132 D upright vitrectomy lens
 132 D indirect lens
 without an inverter because of an internal prismatic system
 Less cost

Image Mag: .45x
Static FOV: 100°
Dynamic FOV: 135°

14. Non contact systems
 EIBOS (erected image binocular microscope)
 In-built inverter
 90, 132 D lenses
 100, 125 degree field

15. Non contact systems
 Volk merlin

16. Non contact systems
 Ziess resight 500 and resight 700
 Autoclaveable 60 D and 128 D

17. Contact Systems
 needs an inverter to re-invert the intraoperative image
 they are bulky and not very stable on the cornea

18. Contact systems

19. Contact systems

20.  Small size, ideal for paediatric use
 Primarily meant for ROP patients

22.  Ocular Lenders equatorial vitrectomy II
 Image Mag: .65x
Static FOV: 101°
Dynamic FOV: 131°

23.  Ocular landers wide field

Static FOV: 130°
Dynamic FOV: 146°

24.  HTC lens from oculus
 Hassan tornambe lens
 36° field of view

25. RECENT ADVANCES
 optiplex

26. THANK YOU