Comparison of the AcrySof SA60 spherical intraocular lens and the AcrySof Toric SN60T3 intraocular lens outcomes in patients with low amounts of corneal astigmatism

Abstract

The AcrySof Toric IOL provides a significant improvement in postoperative astigmatism and UCVA when compared statistically with its spherical counterpart for patients with low degrees of corneal astigmatism.

Comparison of clinical outcomes between limbal relaxing incisions and toric intraocular lenses in eyes with astigmatic corneas

“…However, APV (the vector between origin and each data point) is more homogeneously concentrated around origin in the toric IOL plot than in the LRI plot, which is suggestive of lower postoperative astigmatism in the toric IOL group. (20) …”

“…(20) Such vectorial astigmatism analysis is gaining popularity in literature in recent years, as an increasing number of articles employ it as analytical instrument. (1,4,7,8,21,22) Figure 4 compares mean magnitudes of pre and postoperative APV within each group and between groups.…”

Astigmatism treatment during phacoemulsification: a review of current surgical strategies and their rationale

“…The use of toric IOL have been reported to be an effective method of reducing postoperative refractive astigmatism and spectacle dependence following cataract surgery (47) . Rotational stability of toric IOL is an issue of major concern, once proper alignment is critical for compensating corneal cylinder, resulting in good uncorrected vision.…”

“…Rotational stability of toric IOL is an issue of major concern, once proper alignment is critical for compensating corneal cylinder, resulting in good uncorrected vision. Each degree of rotation causes an average loss of cylinder power of approximately 3%; thus, when an IOL rotates 30 degrees there is no astigmatic correction, although there is a change of axis (44,(46)(47)(48)(49)(50)(51)(52)(53)(54)(55) . Articles comparing the use of toric IOL to other astigmatism reducing techniques, such as opposed clear corneal incisions (56) or LRI (57) , are still scanty in number on literature.…”

Alpins and thibos vectorial astigmatism analyses: proposal of a linear regression model between methods

“…Thus, a power vector is that vector drawn from the coordinate origin of this space to the point (M, J 0 , J 45 ) (7,9) . The magnitude of the asigmatic power vector (APV) on the astigmatic plane is defined by (J 0 2 +J 45 2 ) 1/2 and represents a non-signed scalar that may be used to determine statistical differences in the magnitude of astigmatism between two datasets (10,11) . To our knowledge, Alpins and Thibos analyses are not readily interchangeable to one another, when it comes to their mathematical results and interpretation.…”