J Korean Ophthalmol Soc.  2012 Dec;53(12):1749-1755. 10.3341/jkos.2012.53.12.1749.

Effect of Preoperative Crystalline Lens Rise on Vaulting after Implantable Collamer Lens Implantation

• Kwak AY
• Ryu IH
• Kim JK
• Kim TI
• Ha BJ

• KMID: 2216386
• DOI: http://doi.org/10.3341/jkos.2012.53.12.1749

Abstract

PURPOSE
To evaluate the parameters affecting vaulting and correlation between preoperative crystalline lens rise and vaulting after implantable collamer lense (ICL) implantation.
METHODS
A total of 53 eyes of 34 patients who underwent ICL implantation were examined retrospectively. White-to-white (WTW) and anterior chamber depth (ACD) were obtained from scanning topography (ORB scan) before surgery. Preoperative crystalline lens rise (CLR) and vaulting at 6 months after ICL implantation were measured using anterior segment optic coherence tomography (AS-OCT). Multiple regression analysis was performed to evaluate the factors affecting central vaulting.
RESULTS
The mean preoperative crystalline lens rise was -120 +/- 219 microm, and mean central vaulting 6 months after surgery was 544 +/- 175 microm. Preoperative SE, WTW, ACD, and CLR were significantly correlated with vaulting at 6 months after surgery. With the use of meaningful variables, multiple regression analysis showed that CLR, WTW, ACD and SE, in that order of influence, had significant effects on vaulting and the multiple regression equation was obtained as follows: Vaulting (microm) = (160.913 x ACD (mm)) + (170.134 x WTW (mm)) + (-0.338 x CLR (microm)) + (-23.783 x SE (D)) - 2250.184.
CONCLUSIONS
CLR had a stronger influence on vaulting after ICL implantation than the previously proven parameters: WTW, ACD, and SE. In addition to WTW, ACD and SE, CLR should also be considered a new criterion for estimating vaulting after ICL implantation.

Keyword

Anterior chamber depth; Crystalline lens rise; Implantable contact lens; Vaulting; White-to-white

MeSH Terms

Anterior Chamber
Crystallins
Eye
Humans
Lens, Crystalline
Lenses, Intraocular
Retrospective Studies
Crystallins

Figure

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  Figure 1 Crystalline lens rise which is the distance between the anterior pole of the crystalline lens and the line connecting the 3 o'clock to 9 o'clock angle recess is measured on the horizontal diameter median image of anterior segment OCT. In this patient, crystalline lens rise is 320 µm.

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  Figure 2 Anterior segment OCT image of the left eye of a 25-year-old man at 6 months after ICL implantation. Vaulting is 410 µm.

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  Figure 3 Correlation between spherical equivalent and the central vaulting of the ICL.

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  Figure 4 Correlation between horizontal white-to-white distance and the central vaulting of the ICL.

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  Figure 5 Correlation between anterior chamber depth and the central vaulting of the ICL.

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  Figure 6 Correlation between crystalline lens rise and the central vaulting of the ICL.

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