OCT

[dan2233]

I had an OCT the other day at the Opthalm. office. The Doc said it doesnt use any radiation..only light rays...
can a Doctor explain more how it collects data and also how much does an OCT like the Zeiss 5000 full featured scanner cost roughly??

[John C Hagan III, MD, FACS, FAAO]

-

[DonW66]

The OCT - optical coherence tomograph.

Light starts off from the OCT and enters the cornea...
... then thru the lens, the vitreous, the inner retina, then the photoreceptors, then the RPE, then the choroid.

At each interface reflecting just a very little back at the OCT.
(...most of the stuff (light) bouncing off elsewhere).

And the OCT takes that very tiny reflection and compares it with the "coherent" light just coming out of the OCT.

And that is just one pixel!!

A most remarkable machine.

Don W.

PS.
Google OCT -- should give a rigourous explain.

[John C Hagan III, MD, FACS, FAAO]

I don't have the time or inclination. Go to wikipedia
JC MD

[dan2233]

can you describe optical resonance??

[John C Hagan III, MD, FACS, FAAO]

You were told the truth. OCT (optical coherent tomography) uses optical resonance not magnetic resonance so there is no radiation produced. Our Zeis HD-OCT cost us about $75,000

JCH MD