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Toric phakic implantable collamer lens for correction of astigmatism: 1-year outcomes.

Mertens EL - Clin Ophthalmol (2011)

Bottom Line: More than 60% of the eyes gained ≥1 line of BCVA (17 eyes, safety index of 1.14).For J(0) and J(45), 97.7% and 83.7% were within ±0.50 D, respectively.The results of the present study support the safety, efficacy, and predictability of toric implantable collamer lens implantation to treat moderate to high myopic astigmatism.

View Article: PubMed Central - PubMed

Affiliation: Medipolis Eye Centre, Antwerp, Belgium.

ABSTRACT

Purpose: The purpose of this study was to assess predictability, efficacy, safety and stability in patients who received a toric implantable collamer lens to correct moderate to high myopic astigmatism.

Methods: Forty-three eyes of 23 patients underwent implantation of a toric implantable collamer lens (STAAR Surgical Inc) for astigmatism correction. Mean spherical refraction was -4. 98 ± 3.49 diopters (D) (range: 0 to -13 D), and mean cylinder was -2.62 ± 0.97 D (range: -1.00 to -5.00 D). Main outcomes measures evaluated during a 12-month follow-up included uncorrected visual acuity (UCVA), refraction, best-corrected visual acuity (BCVA), vault, and adverse events.

Results: At 12 months the mean Snellen decimal UCVA was 0.87 ± 0.27 and mean BCVA was 0.94 ± 0.21, with an efficacy index of 1.05. More than 60% of the eyes gained ≥1 line of BCVA (17 eyes, safety index of 1.14). The treatment was highly predictable for spherical equivalent (r(2) = 0.99) and astigmatic components: J(0) (r(2) = 0.99) and J(45) (r(2) = 0.90). The mean spherical equivalent dropped from -7.29 ± 3.4 D to -0.17 ± 0.40 D at 12 months. Of the attempted spherical equivalent, 76.7% of the eyes were within ±0.50 D and 97.7% eyes were within ±1.00 D, respectively. For J(0) and J(45), 97.7% and 83.7% were within ±0.50 D, respectively.

Conclusion: The results of the present study support the safety, efficacy, and predictability of toric implantable collamer lens implantation to treat moderate to high myopic astigmatism.

No MeSH data available.


Related in: MedlinePlus

Scatter plot of the astigmatic vectors (J0 and J45) before and 12 months after toric implantable collamer lens implantation. The more central location of postoperative data around 0 represents the reduction of preoperative astigmatism by the implantation of the toric implantable collamer lens. Note that (0,0) represents an eye free of astigmatism.
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f5-opth-5-369: Scatter plot of the astigmatic vectors (J0 and J45) before and 12 months after toric implantable collamer lens implantation. The more central location of postoperative data around 0 represents the reduction of preoperative astigmatism by the implantation of the toric implantable collamer lens. Note that (0,0) represents an eye free of astigmatism.

Mentions: The improvement in M refractive error is graphically illustrated in Figure 4. The mean M dropped significantly from −7.29 ± 3.4 D to −0.17 ± 0.40 D at 12 months (P < 0.05). Figure 5 shows the astigmatic components of the power vector as represented by the two-dimensional vector plot (J0, J45) where the tight distribution of points around zero is evident 12 months after surgery compared to preoperative data. The origin in this graph (0,0) represents an eye free of astigmatism. A multivariate Hotelling T2 test confirmed that the mean power vector after surgery was not significantly different from a vector of zero length (P = 0.3256).


Toric phakic implantable collamer lens for correction of astigmatism: 1-year outcomes.

Mertens EL - Clin Ophthalmol (2011)

Scatter plot of the astigmatic vectors (J0 and J45) before and 12 months after toric implantable collamer lens implantation. The more central location of postoperative data around 0 represents the reduction of preoperative astigmatism by the implantation of the toric implantable collamer lens. Note that (0,0) represents an eye free of astigmatism.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3065582&req=5

f5-opth-5-369: Scatter plot of the astigmatic vectors (J0 and J45) before and 12 months after toric implantable collamer lens implantation. The more central location of postoperative data around 0 represents the reduction of preoperative astigmatism by the implantation of the toric implantable collamer lens. Note that (0,0) represents an eye free of astigmatism.
Mentions: The improvement in M refractive error is graphically illustrated in Figure 4. The mean M dropped significantly from −7.29 ± 3.4 D to −0.17 ± 0.40 D at 12 months (P < 0.05). Figure 5 shows the astigmatic components of the power vector as represented by the two-dimensional vector plot (J0, J45) where the tight distribution of points around zero is evident 12 months after surgery compared to preoperative data. The origin in this graph (0,0) represents an eye free of astigmatism. A multivariate Hotelling T2 test confirmed that the mean power vector after surgery was not significantly different from a vector of zero length (P = 0.3256).

Bottom Line: More than 60% of the eyes gained ≥1 line of BCVA (17 eyes, safety index of 1.14).For J(0) and J(45), 97.7% and 83.7% were within ±0.50 D, respectively.The results of the present study support the safety, efficacy, and predictability of toric implantable collamer lens implantation to treat moderate to high myopic astigmatism.

View Article: PubMed Central - PubMed

Affiliation: Medipolis Eye Centre, Antwerp, Belgium.

ABSTRACT

Purpose: The purpose of this study was to assess predictability, efficacy, safety and stability in patients who received a toric implantable collamer lens to correct moderate to high myopic astigmatism.

Methods: Forty-three eyes of 23 patients underwent implantation of a toric implantable collamer lens (STAAR Surgical Inc) for astigmatism correction. Mean spherical refraction was -4. 98 ± 3.49 diopters (D) (range: 0 to -13 D), and mean cylinder was -2.62 ± 0.97 D (range: -1.00 to -5.00 D). Main outcomes measures evaluated during a 12-month follow-up included uncorrected visual acuity (UCVA), refraction, best-corrected visual acuity (BCVA), vault, and adverse events.

Results: At 12 months the mean Snellen decimal UCVA was 0.87 ± 0.27 and mean BCVA was 0.94 ± 0.21, with an efficacy index of 1.05. More than 60% of the eyes gained ≥1 line of BCVA (17 eyes, safety index of 1.14). The treatment was highly predictable for spherical equivalent (r(2) = 0.99) and astigmatic components: J(0) (r(2) = 0.99) and J(45) (r(2) = 0.90). The mean spherical equivalent dropped from -7.29 ± 3.4 D to -0.17 ± 0.40 D at 12 months. Of the attempted spherical equivalent, 76.7% of the eyes were within ±0.50 D and 97.7% eyes were within ±1.00 D, respectively. For J(0) and J(45), 97.7% and 83.7% were within ±0.50 D, respectively.

Conclusion: The results of the present study support the safety, efficacy, and predictability of toric implantable collamer lens implantation to treat moderate to high myopic astigmatism.

No MeSH data available.


Related in: MedlinePlus