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Basal secretion test

(A) Topical anesthesia is placed in each eye. Whatman 41 filter strips are placed in the temporal inferior cul-de-sac.
(B) The filter strip absorbs the tears as they are produced.

Adapted with permission from: Paysse EA, Coats DK, Cassidy M. Refinements Volume III/Number 2. San Francisco: American Academy of Opthalmology, 1999.

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