J Korean Ophthalmol Soc.  2008 Jan;49(1):48-56. 10.3341/jkos.2008.49.1.48.

Clinical Outcomes of Toric Iris-fixated Phakic Intraocular Lens: Six-Month Follow-up

• Chung JL
• Kim SW
• Kim TI
• Lee HK
• Kim EK

• KMID: 2211182
• DOI: http://doi.org/10.3341/jkos.2008.49.1.48

Abstract

PURPOSE: To evaluate the clinical results of toric iris-fixated phakic intraocular lens (Artisan(R)) implantation for the correction of myopia with astigmatism.
METHODS
Sixteen eyes of 11 patients underwent toric Artisan(R) lens implantation between April 2004 and February 2006 and were followed up for 6 months. We analyzed visual acuity, refraction, change in astigmatism, efficacy, safety, predictability, and complications.
RESULTS
Among 11 patients, 4 were men and 7 were women, with an average age of 30.9 years. The preoperative mean uncorrected visual acuity (UCVA) was 0.02, except for 1 eye with post-LASIK astigmatism (0.4); the mean spherical equivalent refraction was -11.06+/-4.11D; and the mean astigmatism was -2.91+/-0.91D. At postoperative 1 month, 3 months, and 6 months, UCVA was more than 0.8 in 31%, 69%, 81% of eyes and more than 0.5 in 94%, 94%, 100% of eyes, respectively. Mean astigmatism decreased to -2.28, -1.37, and -0.73 and the spherical equivalent refraction was within 1.0D in 56%, 81%, 88% of eyes, respectively. For the vector analysis of astigmatic change, a doubled-angle scatterplot revealed that the postoperative 6 month data were located mainly at the center of the plot, which indicated a considerable reduction of astigmatism by magnitude and axis. At postoperative 6 months, the efficacy and safety indices were 99.0% and 114.7%, respectively. Complications included transient elevation of intraocular pressure in 1 eye and nighttime glare or halo in 3 eyes.
CONCLUSIONS
Although the patient population was small, six-month clinical results demonstrate that the implantation of the toric Artisan lens was safe, reliable, and effective for correcting high myopia with astigmatism.

Keyword

Artisan; Intraocular lens; Iris-fixated; Phakic; Toric

MeSH Terms

Astigmatism
Axis, Cervical Vertebra
Eye
Female
Follow-Up Studies
Glare
Humans
Intraocular Pressure
Lenses, Intraocular
Male
Myopia
Phakic Intraocular Lenses
Visual Acuity

Figure

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  Figure 1. Postoperative uncorrected visual acuity (UCVA).

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  Figure 2. Reduction in total manifest refraction during preoperative versus postoperative period. Horizontal lines indicate medians and 1st and 3rd quartiles. Vertical extensions indicate 10th/90th percentile values.

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  Figure 3. Reduction in total astigmatism during preoperative versus postoperative period. Horizontal lines indicate medians and 1st and 3rd quartiles. Vertical extensions indicate 10th/90th percentile values.

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  Figure 4. Predictability of postoperative spherical equivalent (SE)

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  Figure 5. Scattergram of achieved refraction (spherical equivalent) against intended refraction at 6 months. The diagonal line show equality and overcorrection and undercorrection by 1 diopter; D=diopters.

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  Figure 6. Doubled‐ angle scatterplot showing a polar plot of the preoperative spectacle plane refractive astigmatism at a vertex distance of 12 mm by using the value of cylinder for the magnitude and the axis of the astigmatism for the angle. The 0° and 180° locations are the same, just as 0° and 180° are the same for the axis of refraction.

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  Figure 7. Doubled‐ angle scatterplot showing a polar plot of the 6‐ month‐ postoperative spectacle plane refractive astigmatism at a vertex distance of 12 mm by using the value of cylinder for the magnitude and the axis of the astigmatism for the angle. The postoperative data are located at the center of the plot, which illustrates the great reduction of preoperative astigmatism by the implantation of toric phakic intraocular lenses.

Reference

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