hydrodelineation

hydrodelineation

/hy·dro·de·lin·e·a·tion/ (-de-lin″e-a´shun) injection of fluid between the layers of the nucleus of the lens using a blunt needle; done to delineate the nuclear zones during cataract surgery.
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Some surgeons follow this step with the injection of BSS into the nucleus to separate the nucleus into the central hard endonucleus and outer softer epinucleus, in a process called hydrodelineation.
Among the topics are phaco methods and device settings, hydrodissection and hydrodelineation, chip and flip, cortex removal, and decision taking in cataract operations.
The nucleus is then separated from the cortex by a similar method called hydrodelineation.