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Irregularities on the surface of single-piece AcrySof SA60AT intraocular lenses
Dan Q Nguyen1, Tarek A Saleh, Suresh K Pandey
1Department of Ophthalmology, Taunton and Somerset Hospital, Taunton, United Kingdom.
Journal of Cataract and Refractive Surgery
|April 25, 2006
Summary
Surface irregularities on AcrySof SA60AT intraocular lenses (IOLs) were identified as physical damage, likely from packaging. Early detection of these IOL defects before cataract surgery is crucial for patient safety.
Area of Science:
- Ophthalmology
- Biomaterials Science
- Medical Device Engineering
Background:
- AcrySof SA60AT intraocular lenses (IOLs) are widely used in cataract surgery.
- Ensuring the integrity of IOLs before implantation is critical for patient outcomes.
Purpose of the Study:
- To investigate macroscopic surface irregularities observed on AcrySof SA60AT IOLs.
- To determine the nature and origin of these IOL surface defects.
Main Methods:
- A case series of twelve AcrySof SA60AT IOLs with apparent surface irregularities.
- Analysis included gross examination, light microscopy, and scanning electron microscopy.
- Samples were examined at multiple international research and manufacturing facilities.
Main Results:
- Light microscopy revealed fine lesions on both anterior and posterior IOL surfaces, including optics and haptics.
- Scanning electron microscopy confirmed physical/mechanical damage to the IOLs.
- The damage was attributed to compression during the packaging process.
Conclusions:
- Implantation of defective IOLs poses a significant risk in cataract surgery.
- Modern IOLs can still exhibit manufacturing or packaging defects.
- Pre-implantation microscopic examination of IOLs can identify critical flaws.