Assertion: castor oil's effect | /r/HasProperty | the most well-researched
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Source sentences:
text: The effects of long-term amiodarone use on eye health are perhaps the most well-researched and include decreased visual acuity due to optic neuropathy, optic disc edema, and corneal deposits, which in some cases also cause visions of halos around lights, photophobia, dry eyes, and blurred vision.2