RALV® from DEZIMAL is a non-invasive optical system for the precise prediction of achievable vision after refractive lens exchange. It enables presbyopic patients to look through real intraocular lenses before surgery in order to experience postoperative vision before implantation.
The goal of RALV is to achieve the highest possible patient satisfaction after refractive lens exchange - less complaints and less explantations.
RALV allows to “test” an IOL on objects and vision charts in near, intermediate and far distances, allowing patients to subjectively evaluate different IOL types and designs (monofocal, EDoF, multifocal - refractive and diffractive) to find the one that individually fits best. Likewise, RALV supports selecting the right candidate for a certain type of IOL.
Features
The IOLs in RALV are mounted in so-called IOL shuttles, which are magnetically inserted into the optical path of RALV, allowing rapid exchange for direct comparison of different IOLs.
RALV can be used with any type of IOL and is open to all IOL manufacturers.
The device is controlled by the RALV APP, which also displays various interactive tests to evaluate vision with an IOL.
For IOL selection, a qualitative visual impression test allows patients to look at different objects in space or at a distant light source through various intraocular lenses, helping them choose the one they feel most comfortable with.
To quantify the patient's achievable vision with an IOL, RALV enables the measurement of visual acuity and contrast sensitivity at near, intermediate, and far distances, as well as the amount of halo/glare.
Additionally, a complete defocus curve can be recorded in a minimal amount of time.
Technical Data
Field-of-view
Spherical compensation
Cylindrical compensation
Visual acuity range
Contrast sensitivity range
Halo/glare range
Defocus curve range
20°
-10.00 to +10.00 D (in 0.25 D steps)
-0.75 / -1.00 / -1.50 / -2.00 D (other powers on request)
NEAR, INTER: 0.10 to 1.00 dec | FAR: 0.10 bis 1.25 dec
0.50 to 1.75 logCSWeber
6.0 bis 32.6 mrad
-4.00 to +1.00 D