fornix

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Related to conjunctival fornix: bulbar conjunctiva, palpebral conjunctiva

fornix

[′fȯr‚niks]
(anatomy)
A structure that is folded or arched.
(botany)
A small scale, especially in the corolla tube of some plants.

fornix

In ancient Roman construction, a vaulted surface.
References in periodicals archive ?
In the current study, we noted a significant difference between tear measurements when the PRTT thread was placed under the upper eyelid margin and in the lower conjunctival fornix. The exact cause for this variation is unknown; however, this difference could be caused by the larger conjunctival sac of the lower eyelid compared with the upper eyelid margin and the anatomy of the drainage system of tears in bird eyes.
Here we hypothesize that the thread in the lower conjunctival fornix is absorbing tear fluid from the lacrimal lake formed in the inferior conjunctival fornix, whereas the same pooling effect is not seen when the thread is placed under the upper lid.
In humans, the PRT tear test measures uptake of a (small) amount of fluid residing in the ventral conjunctival fornix and stimulates a low degree of reflex tearing.
By holding the eyes closed, sampling was possible in the usual site of the lower conjunctival fornix. The PRT test method provides repeatable results that are easy to obtain, easy to read, and achieved under the same conditions as the STT.
The STT is performed by inserting a special paper strip into the conjunctival fornix for one minute and the results are reported as mm [min.sup.-1] (GRAHN & STOREY, 2004, BARABINO et al., 2004).