Table 2. Summary of characteristics of the major intraocular vision-improving devices.
| Characterised in devices | IMT | IOP-VIP | iolAMD | EyeMax Mono | Scharioth macula lens (SML) | LMI-SI |
|---|---|---|---|---|---|---|
| Optical Fundamentals | Galilean type telescope; telephoto effect that enlarge images in the central VF | Galilean type telescope; 2 IOLs (−66 D biconcave and +55 D biconvex); direct to a healthy part of the retina | Galilean type telescope; 2 lens (−49 D IOL 2 and +63 D IOL 1); distribute the retina image 3° apart from the fovea | Single lens; hyperaspheric design increase the quality of the image of the macula at ≤10° of retinal eccentricity | Near Triad Reflex; central optic area providing high additional +10 D | Cassegrain telescope configuration; uses mirrors instead of lenses; central magnified image of about 20° |
| Country | USA | Italy | United Kingdom | United Kingdom | Switzerland | Israel |
| Magnification | 3× | 1.3× | 1.25× to 1.3× | 1.1× to 1.2× | 2.0× | 2.5× |
| Material | Quartz glass | Polymethyl methacrylate (PMMA) | Hydrophobic acrylic | hydrophobic acrylic | Hydrophilic acrylic | Poly-para-xylylenes (Parylene C) for entire IOL; titanium oxide and silicon dioxide (dielectric coatings) for reflecting surfaces |
| Diameter (mm) | Telescope 4.4; haptic-to-haptic diameter: 13.5; lens aperture: 3.2 | Diameter 5; maximum AT for AC IOL 1.5; peripheral thickness for IOL in capsular bag 1.5; length 13 | IOL 2: optic 4, overall length 11; haptic vaulted posteriorly about 15°; IOL 1: optic 5, diameter 11.75–12 m; the distance between IOLs 2 | Optic 5; overall length 11.75–12; the haptic is vaulted posteriorly | Overall diameter 13 with 4 flex haptics; central optic diameter 1.5 | Diameter 5–6; central thickness 1.25 |
| Foldable | No | No | Yes | Yes | Yes | No |
| Lens Status | Phakic | Phakic or pseudophakic eyes | Phakic eyes | Phakic or pseudophakic eyes | Pseudophakic eyes | Phakic or pseudophakic eyes |
| Incision size (mm) | 10–12 | 7 | 3 | 2.8 | 2.2 | 5–5.5 |
| Implant position | Capsular bag | Capsular bag and AC | capsular bag (IOL 2) and sulcus (IOL 1) | Capsular bag or sulcus | Ciliary sulcus | Sulcus |
| Binocular/monocular | Monocular | Binocular | Binocular | Binocular | Monocular | Binocular |
| Need PRL pick | No | Yes | Yes | No | No | No |
| Rehabilitation needed | Yes | Yes | Yes | No | No | Yes |
| Pros | Greater magnification; works for both far and near; the only device with FDA approval | IOL-VIP Revolution can be used for wet AMD, glaucoma and degenerative myopia | Foldable, 3 mm sutureless incision, can dial the lens to another position if AMD expansion | Foldable, small sutureless incision, high-quality image in all areas of the macular extending up to 10° from the fovea in case of PRL changes or AMD progression. No extensive visual rehabilitation | Small incision, independent from lens status; no reduction of VF | Keep peripheral VF remain normal; high magnification |
| Cons | Big size, 12 or 7 mm sutured incision, endothelium cell loss, reduce the VF to 20–25° | Long surgery, 8 mm sutured incision, need prophylactic peripheral iridotomy | Relative unpredictability in the location of the lenses which could affect the final refraction | Relative unpredictability in the location of the lenses which could affect the final refraction | Does not provide distance vision magnification; magnification only achieved in a range of 10 to 15 cm from the eye | The risk of glare effects |
Note: https://www.medicontur.com/scharioth_macula_lens. Near Triad Reflex: miosis-accommodation-convergence. **AT, axial thickness; PRL, prefer retinal location.