I reckon that there’s no current anatomical term for this in Hungarian. So I’d use an explanation, like the one I propose.
There are expressions for the network of fibers that is responsible for the more gelatinous consistency of these outer regions of the vitreous body - e.g. “üvegtest vázalkotó rosthálózata,” “kollagén rostok,” “stroma vitreum,” etc. However, using a denomination of this network (or framework) probably isn’t correct in the context.
For written materials about the vitreous body, see my web references. (For the definition in English, see the first discussion entry, too.)

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Note added at 45 days (2020-12-03 18:20:18 GMT) Post-grading
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Köszönöm.