Leon Au Consultant corneal and glaucoma specialist Manchester Royal - - PowerPoint PPT Presentation

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leon au consultant corneal and glaucoma specialist
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Leon Au Consultant corneal and glaucoma specialist Manchester Royal - - PowerPoint PPT Presentation

May 01, 2023 433 likes •747 views

Anterior Segment OCT Leon Au Consultant corneal and glaucoma specialist Manchester Royal Eye Hospital Zeiss Visante Based on low-coherence inter- ferometry using 1310nm superluminescent light emitting diode Axial resolution 18um (vs

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Anterior Segment OCT

Leon Au Consultant corneal and glaucoma specialist Manchester Royal Eye Hospital

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Zeiss Visante

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  • Based on low-coherence inter-

ferometry using 1310nm superluminescent light emitting diode

  • Axial resolution 18um (vs 25um in

UBM)

  • Tissue penetration 6mm (vs 5mm UBM)
  • Non contact and fast
  • Penetrates cloudy cornea and sclera
  • Blocked by pigment, no ciliary body
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  • Has a fixation target
  • Performed in complete darkness

(uses infra-red camera)

  • Induces accommodation to measure

lens movement

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Basic function

Anterior segment

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High resolution of angle

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measurement

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Anterior segment OCT imaging in mucopolysaccharidoses type I, II, and VI.

Ahmed TY, Turnbull AM, Attridge NF, Biswas S, Lloyd IC, Au L, Ashworth JL. Eye (Lond). 2014 Mar;28(3):327-36. doi: 10.1038/eye.2013.281.

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Corneal scar

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Endothelial keratoplasty (DSEK)

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Brittle cornea syndrome: recognition, molecular diagnosis and management Emma MM Burkitt Wright, Louise F Porter, Helen L Spencer, Jill Clayton-Smith, Leon Au, Francis L Munier, Sarah Smithson, Mohnish Suri, Marianne Rohrbach, Forbes DC Manson, Graeme CM Black Orphanet J Rare Dis. 2013; 8: 68. Published online 2013 May 4. doi: 10.1186/1750-1172-8-68

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Post cataract surgery

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Trab assessment

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The use of anterior segment optical coherence tomography in glaucoma drainage implant surgery.

Au L, Fenerty C. Ophthalmic Surg Lasers Imaging. 2008 Mar-Apr;39(2):164-6.

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Hypotony

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Cyclodiaysis cleft

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Cleft under flap

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Silicone oil under conjunctiva

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Conclusion

  • High quality images
  • Non contact
  • Fast
  • Tolerant to movement
  • Extremely valuable tool !!