MAIN OBJECTIVE: To assess the influence of residual astigmatism on visual acuity in the different lens foci in patients operated on for cataracts with a trifocal intraocular lens implant. SECONDARY OBJECTIVE: To study the influence of residual astigmatism on the visual quality of the patient in the far focus and to determine if there are differences of affectation in the two study groups.
It will be studied how small residual astigmatisms after cataract surgery degrade the visual acuity of patients in the three focal planes of trifocal IOLs. Not only VA will be studied, but also visual quality through contrast sensitivity curves.
Study Type
OBSERVATIONAL
Enrollment
48
Patients will be divided between groups based on pre-surgery corneal astigmatism. Group FineVision is made up of patients with corneal astigmatism less than 1 D. Groups FineVision Toric is made up pf patients with corneal astigmatism more than 1.25 D
Clinica Oftalmológica TACIR
Barcelona, Spain
RECRUITINGVisual Acuity
Visual acuity will be measured at distance, intermediate distance (67 cm) and near (40 cm). Visual acuities will be obtained with logarithmic notation
Time frame: 3 months following cataract surgery
Contrast Sensitivity Function (CSF)
Contrast sensitivity will be measured at far, intermediate distance (67 cm) and near (40 cm).
Time frame: 3 months following cataract surgery
Differences between groups
Results will be compared between groups.
Time frame: 3 months following cataract surgery
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