Torische Hinterkammerlinsen nach Kataraktoperation und refraktiven Linsenaustausch

Abstract

Patients with astigmatism (e.g. regular or keratoplasty-induced astigmatism) who undergo cataract surgery or refractive lens exchange with a standard monofocal IOL are often disappointed. Toric IOLs (T-IOLs) are, therefore, an excellent alternative for this condition. T-IOLs are now available from companies such as Alcon, Acri, Tec, Humanoptics, Wavelight, Rayner and Staar. Apart from Alcon and Staar who only produce T-IOLs with a fixed torus, all these produce customised lenses. The calculations needed for production of the T-IOLs are generally done by the companies and are based on the corneal astigmatism. T-IOLs have shown good rotational stability and good functional results. Corneal astigmatism can still be measured postoperatively, as it is corrected inside the eye. The referring ophthalmologist should exercise discretion when prescribing spectacles after surgery of this kind.

Injectable 1-piece hydrophilic acrylic toric intraocular lens for cataract surgery: Efficacy and stability

“…12 In our study, there was a low rate and magnitude of rotation of the T-flex 623T IOL, with 91% of IOLs being within G10 degrees of the intended axis at 4 months. All patients achieved a CDVA of 6/9 or better, and the mean reduction in refractive astigmatism was 2.95 D. Similar to our results, Auffarth et al 22 report good rotational stability and good functional results in their study of the same toric IOL model. Table 2 is a summary of published data on toric IOL rotation.…”

Matched comparison of rotational stability of 1-piece acrylic and plate-haptic silicone toric intraocular lenses in Asian eyes

“…It is reasonable to consider that misalignment of fewer than 5 degrees might be attributed to observational errors when a slitlamp photographic technique is used for axis measurement; these errors might be related to reference marking and reading and preoperative keratometry readings other than IOL rotation, as mentioned in other studies. 17,25 The CDVA and residual astigmatism were comparable in the 2 IOL groups. The slightly higher rotational standard deviation in the silicone IOL group in our study might not have been visually significant.…”

“…The outcomes in eyes with the Acrysof IOL are comparable to the U.S. Food and Drug Administration (FDA) submission data and to results in other studies of Acrysof toric IOL rotational stability. [12][13][14][15][16][17][18] In our study, the mean rotation in the acrylic toric IOL group was 4.23 G 4.28 degrees. Sixty-four percent of eyes had less than 5 degrees of rotation and none had more than 15 degrees of rotation 3 months postoperatively.…”

Transscleral fixation of a toric intraocular lens to correct aphakic keratoplasty with high astigmatism

“…We have observed this phenomenon frequently when PKP patients are corrected using toric IOLs. 12 The subjective refraction and the measured corneal power values sometimes differ significantly.…”

“…[1][2][3][4][5][6][7][8][9][10][11] The situation is complicated when the aphakic patient has additional pathology, such as high postkeratoplasty astigmatism. 6,7,[10][11][12] Toric contact lenses would be the simple solution but are sometimes difficult to fit or not tolerated. Spectacle correction is impossible in unilateral aphakic situations.…”