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To investigate the effect of yellow-tinted IOLs on the Short Wave-length Automated Perimetry (SWAP) and Standard Automated Perimetry (SAP) in patients with and without glaucoma.
Glaucoma is mostly a disease of old people and is highly accompanied with cataract.Some of these patients may need to perform cataract surgery during the course of glaucoma. But in glaucoma patients, the effect of cataract surgery and/or type of implanted intraocular lens (IOL) on the results of specific visual field tests, like SWAP, is still not well studied.From the past decade, various yellow-tinted IOLs with the speculation of protecting the retinal photoreceptors and decreasing the incidence of age-related macular degeneration have been introduced.These blue-light-filtering IOLs contain a yellow chromophore that filters ultra violet (UV) and a larger part of the high-energetic visible blue-light between 380 and 500 nm. Based on previous studies yellow-tinted IOLs decrease the amount of light transmission to the retina which may theoretically affect perimetry results. This might be even more important in patients with glaucoma where the sensitivity of test locations has decreased per se.
Since early diagnosis of glaucoma and its progression is highly dependent on visual field results, it is important to evaluate the effect of these IOLs on perimetry, particularly on SWAP, in which the blue-light-filtering IOLs might interfere with its findings.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Group 1, glaucoma and cataract | Active Comparator | Group1 were those patients with visually significant cataract (less than grade 2) and mild to moderate open angle glaucoma |
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| Group2, cataract patients | Sham Comparator | This group included those patients with visually significant cataract and normal other eye examination. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Phacoemulsification with yellow-tinted intraocular lens | Procedure | Phacoemulsification is a kind of cataract surgery using ultrasound machine. Yellow-tinted intraocular lens are a sort of lens with the ability to filter blue and ultraviolet spectrum of light (380-500 nanometer) |
| Measure | Description | Time Frame |
|---|---|---|
| Mean deviation changes on SAP and SWAP before and after surgery | Mean deviation(decibel) which is the average change of visual field points from normal age- matched group ,was obtained from visual field print out. Its value is from 0 to -30 decibels where the lower values means the point is more damaged. | 2.5months |
| Measure | Description | Time Frame |
|---|---|---|
| Visual Acuity changes measured with Snellen chart and Pattern Standard Deviation (PSD)and Foveal threshold (FT) changes on SAP and SWAP. | visual acuity measurements were converted to logarithm minimum angle of resolution (logMAR).PSD (decibel)and FT(decibel) were obtained from the Humphrey visual field machine printout. | 2.5 months |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Naveed Nilforushan, M.D | Rassoul Akram hospital,Department of Ophthalmology,Iran University of Medical Sciences | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Rassoul Akram Hospital | Tehran | Tehran Province | Iran |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 20525530 | Background | Jang SY, Ohn YH, Kim SW. Effect of yellow-tinted intraocular lenses on short-wavelength automated perimetry. Am J Ophthalmol. 2010 Aug;150(2):243-247.e1. doi: 10.1016/j.ajo.2010.02.023. | |
| 16863969 | Background | Kara-Junior N, Jardim JL, de Oliveira Leme E, Dall'Col M, Susanna R Jr. Effect of the AcrySof Natural intraocular lens on blue-yellow perimetry. J Cataract Refract Surg. 2006 Aug;32(8):1328-30. doi: 10.1016/j.jcrs.2006.03.033. |
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| Phacoemulsification with yellow-tinted intraocular lens | Procedure | Phacoemulsification is a kind of cataract surgery using ultrasound machine. Yellow-tinted intraocular lens are a sort of lens with the ability to filter blue and ultraviolet spectrum of light. |
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| ID | Term |
|---|---|
| D002386 | Cataract |
| D005901 | Glaucoma |
| D005902 | Glaucoma, Open-Angle |
| ID | Term |
|---|---|
| D007905 | Lens Diseases |
| D005128 | Eye Diseases |
| D009798 | Ocular Hypertension |
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| ID | Term |
|---|---|
| D018918 | Phacoemulsification |
| ID | Term |
|---|---|
| D002387 | Cataract Extraction |
| D054140 | Refractive Surgical Procedures |
| D013508 | Ophthalmologic Surgical Procedures |
| D013514 | Surgical Procedures, Operative |
| D059708 | Ultrasonic Surgical Procedures |
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