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US 2003/0193661 A1Published application
Intraocular lens inspection method
AssigneeNone recorded
InventorAkira Miyata
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AssigneeNone recorded
InventorAkira Miyata
Estimating the term…
An intraocular lens inspection method including: a process of extracting an intraocular lens for inspection for selecting an intraocular lens; this lens is next, in high temperature liquid immersion process, immersed in physiological saline and kept for a specific amount of time at high temperature that would not deteriorate the lens; then in low-temperature liquid immersion process, the lens is removed and transferred to physiological saline kept at low temperature, which is approximately the temperature when clinically used, and the lens is observed macroscopically; and then in inspection process the lens is put in a chamber kept at the same low temperature, its surface is washed and observed by a microscope, and after observation, the lens is returned to its original state, and when the changes are observed over time and consistent glistenings are detected with each observation, it is judged that clinically analogous glistenings will develop.
An intraocular lens inspection method comprising the steps of:
Dependencies are inferred from the claim text.
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1. Field of the invention
The present invention relates to a method for inspecting an intraocular lens, also called an artificial crystalline lens, which is inserted after lensectomy during cataract surgery and has the function of a convex lens, and particularly to an intraocular lens inspection method that makes it possible to judge whether or not a lens should be accepted for or rejected from use by checking for the presence and the extent of glistenings prior to clinical use.
2. Prior art
FIG. 1 is a flowchart showing the processes of an embodiment of the intraocular lens inspection method of the present invention;
FIG. 2A is a side view of part of the inspection mechanism for observing glistenings of an embodiment of the intraocular lens inspection method of the present invention that uses a slit-lamp microscope, and FIG. 2B is an example of the field in which the intraocular land surface for inspection is inspected and observed with a microscope;
FIG. 3 shows the changes over time in glistening diameter using microscopic observation showing a method of determining the day of glistening development by an embodiment of the intraocular lens inspection method of the present invention;
The intraocular lens inspecting method of the present invention is characterized in that:
an inspection intraocular lens extracting process (S-1) is first executed so as to extract an intraocular lens for inspection whereby a plurality of intraocular lenses are selected by random extraction from an intraocular lens production lot;
next in a high-temperature liquid immersion process (S-10), the intraocular lens that has been extracted is immersed in physiological saline which is a sterile aqueous sodium chloride solution isotonic with the same environmental body fluid as when clinically used and kept for a specific amount of time at high temperature Th such that deterioration of the lens does not occur using a first thermostatic liquid cell such as an incubator, which is a thermostatic cultivation device, etc.;