[Postoperative deposits on a second-generation silicone lens].
BACKGROUND
In the literature there have often been reports about deposits (hydroxyapatite) in hydrophilic or hydrophobic intraocular lenses (IOLs). We report, for the first time, about deposits on a silicone IOL of the second generation.


METHODS
A silicone IOL (Allergan, type SI-40) which was extracted due to gradual visual loss, has been examined.


RESULTS
The examination with the scanning electron microscope (SEM) showed crystalline precipitations in the anterior surface of the IOL while the X-ray analysis showed the existence of calcium and carbon, whereas no phosphorus was found.


CONCLUSIONS
It could be hypothesised that metabolic disorders in aqueous humor (i. e., in patients with diabetes mellitus), the quality of the production of the lens, and not the IOL material, are the main cause for deposits in the IOL surface.
Augenklinik der Aristoteles-Universität, Thessaloniki, Greece.
I
I
Tsinopoulos
A
A
Manthos
P
P
Kalpadakis
N
N
Chalvatzis
K
K
Kallinderis
A
A
Alexandridis
D000368:Aged; D002118:Calcium / Q000032:analysis; D002244:Carbon / Q000032:analysis; D003460:Crystallization; D020878:Device Removal; D048909:Diabetes Complications; D017886:Durapatite / Q000032:analysis; D004577:Electron Probe Microanalysis; D019544:Equipment Failure Analysis; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D007910:Lenses, Intraocular; D008297:Male; D008854:Microscopy, Electron; D010758:Phosphorus / Q000032:analysis; D011183:Postoperative Complications / Q000209:etiology / Q000601:surgery; D011474:Prosthesis Design; D012307:Risk Factors; D012828:Silicones
D012828:Silicones; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D010758:Phosphorus; D002244:Carbon; D017886:Durapatite; D002118:Calcium