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Primary objective of this study is to construct and validate a modified luminous efficiency function that addresses the distinct total eye light transmittance of patients that underwent bilateral pseudophakic presbyopic correction with trifocal intraocular lenses (IOLs) implantations.
Present study aims to identify in which degree multifocal IOLs modify eye light transmission and estimate the necessary task and environmental lighting adjustment in order to address lighting needs of patients following bilateral pseudophakic presbyopic corrections. Specifically, the aim of this study is to identify the minimum light intensity in which patients that underwent pseudophakic presbyopic correction with trifocal IOLs can reach their maximum visual acuity (measured when lights are at the 100% lighting level)
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Study group | Patients that underwent uneventful bilateral pseudophakic presbyopic correction with trifocal diffractive IOLs (PanOptix or PanOptix toric, Alcon Laboratories, Inc., Fort Worth, TX, USA) |
| |
| Control group | Patients of similar age without cataract that their crystalline lens has not been replaced. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Phacoemulsification with bilateral trifocal diffractive IOLs | Procedure | Uneventful bilateral pseudophakic presbyopic correction with trifocal diffractive IOLs |
|
| Measure | Description | Time Frame |
|---|---|---|
| Minimum light intensity | Minimum light intensity in which participants reach their maximum critical visual acuity | 6 months postoperatively |
| Measure | Description | Time Frame |
|---|---|---|
| Critical Visual Acuity (CVA) | The print size of the optotype line fulfilling this criterion: all of the following lines are read at a time that is 1.96 times the standard deviation over the average reading time of the larger preceding lines. In clinical practice, the CVA is the minimum VA that can be read with the maximum possible speed. | 6 months postoperatively |
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Inclusion Criteria:
Exclusion Criteria:
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Presbyopic patients that underwent pseudophakic presbyopic correction with bilateral trifocal intraocular lenses implantation
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| Name | Affiliation | Role |
|---|---|---|
| Georgios Labiris, MD, PhD | Associate Professor | Study Chair |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University Hospital of Alexandroupolis | Alexandroupoli | Evros | 68100 | Greece |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 34866900 | Derived | Labiris G, Panagiotopoulou EK, Taliantzis S, Perente A, Delibasis K, Doulos LT. Lighting Standards Revisited: Introduction of a Mathematical Model for the Assessment of the Impact of Illuminance on Visual Acuity. Clin Ophthalmol. 2021 Nov 28;15:4553-4564. doi: 10.2147/OPTH.S326139. eCollection 2021. |
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| ID | Term |
|---|---|
| D011305 | Presbyopia |
| ID | Term |
|---|---|
| D012030 | Refractive Errors |
| D005128 | Eye Diseases |
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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 |
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| D059708 | Ultrasonic Surgical Procedures |