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The purpose of the study is to determine whether implantation of a multifocal IOL with a modified addition at lens plane(Restor +3) results in better intermediate visual acuity with similar performance at distance and near compared to other multifocal IOL with similar design but with higher addition at lens plane. Patient's contrast sensitivity of vision and best reading distance following Restor +3 implantation were also assessed.
Study hypothesis: the implantation of an intraocular lens (IOL) with a modified addition at lens plane (restor +3, Alcon Laboratories,Inc) results in better intermediate visual acuity with similar distance and near visual acuity after cataract surgery.
Patients with bilateral visually significant cataract with corneal astigmatism lower than 1.0D (diopters) will be eligible for inclusion in the study. Exclusion criteria will be any ocular diseases, such as corneal opacities or irregularity, dry eye, amblyopia, anisometropia, glaucoma, retinal abnormalities, surgical complications, IOL tilt, IOL decentration greater than 0.4 mm (estimated by retroillumination), or incomplete follow-up.
Patients will be examined before surgery and at 1, 7, 30, 90 days and 3and 6 months after surgery.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Restor +3 | patients will be implanted bilaterally with Restor + 3 |
| |
| restor +4 | Patients will be implanted bilaterally with Restor +4 |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Implantation of a multifocal Intraocular lens | Other | Bilateral implantation of a multifocal IOl |
|
| Measure | Description | Time Frame |
|---|---|---|
| distance,intermediate and near visual acuity | 1, 3 and 6 months |
| Measure | Description | Time Frame |
|---|---|---|
| reading speed and contrast sensitivity | 6 months |
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Inclusion Criteria:
Exclusion Criteria:
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The sutdy population will be patients implanted bilaterally with the selected multifocal IOL
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| Name | Affiliation | Role |
|---|---|---|
| Marcony Santhiago, MD | University of Sao Paulo | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of São Paulo | São Paulo | São Paulo | 054000 | Brazil |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 19631128 | Background | Gupta N, Wolffsohn JS, Naroo SA. Comparison of near visual acuity and reading metrics in presbyopia correction. J Cataract Refract Surg. 2009 Aug;35(8):1401-9. doi: 10.1016/j.jcrs.2009.03.026. | |
| 19545814 | Background | Biber JM, Sandoval HP, Trivedi RH, de Castro LE, French JW, Solomon KD. Comparison of the incidence and visual significance of posterior capsule opacification between multifocal spherical, monofocal spherical, and monofocal aspheric intraocular lenses. J Cataract Refract Surg. 2009 Jul;35(7):1234-8. doi: 10.1016/j.jcrs.2009.03.013. |
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| 19393889 | Background | Alfonso JF, Fernandez-Vega L, Amhaz H, Montes-Mico R, Valcarcel B, Ferrer-Blasco T. Visual function after implantation of an aspheric bifocal intraocular lens. J Cataract Refract Surg. 2009 May;35(5):885-92. doi: 10.1016/j.jcrs.2009.01.014. |
| 19152978 | Background | Hayashi K, Yoshida M, Hayashi H. All-distance visual acuity and contrast visual acuity in eyes with a refractive multifocal intraocular lens with minimal added power. Ophthalmology. 2009 Mar;116(3):401-8. doi: 10.1016/j.ophtha.2008.09.052. Epub 2009 Jan 18. |