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This part of EN 13503 specifies requirements and test methods for certain mechanical properties of intraocular lenses (IOLs). It is applicable to all types of IOLs intended for implantation in the anterior segment of the human eye, excluding corneal implants, provided that the test method is appropriate to the particular design. NOTE: For certain designs and certain applications, a specific test method described in this part of EN 13503 may not be applicable. In such instances the IOL manufacturer should devise corresponding test methods and provide validation and rationale for them.