Hoffer Multifocal IOL

Hoffer
20D + 3.75D, edge view, anterior surface to the left
3D Visualisation

DESIGNED FOR NANOVISION GROUP BY PROF. KENNETH J. HOFFER, MD 

The rotationally non-symmetric concept applies classic Benjamin Franklin bifocal spectacle techniques to the IOL: the IOL is segmented in such a way that equivalent arcs contain both a far field lens and a near field lens.

The principle of this IOL invented by Prof. Kenneth J. Hoffer, is that the brain can process the two superimposed images simultaneously projected onto the macula and choose which image it wishes to perceive.

The design has a common spherical anterior surface and two aspheric posterior surfaces, each representing 50% of the surface in two 180o arcs as shown opposite:

The IOL design also features the NANOVISION proprietary PCO Firewall which is built on the Hoffer Ridge heritage.

The Hoffer Ridge was originally designed to first lift the majority of the back surface from the posterior capsule to prevent damage to the posterior surface of the IOL while performing a capsulotomy, and then, to increase the pressure at the edge of the IOL against the capsule to block Elschnig pearls from sliding and spreading between the IOL and the capsule. This concept has been modernly adopted in the “sharp edge” technology on most modern IOLs.

SPECIFICATION

1. Near and Far Field Split:

a. 50:50 split near/far
b. Split line linear

2. Far Power:

a. 20.0 D

3. Near Power:

a. 3.75 add, posterior surface

4. Diameter:

a. 6.0 mm

5. Thickness:

a. 3.75 add, posterior surface

6. Surface Form:

a. Aspheric and/or spherical

7. Material:

a. 26% hydrophilic. Refractive Index
b. Refractive index dry: 1.51
c. Swell factor (dry to hyrated): 1.13 (assumed isotropic)

IOLite (HOFFER lens)

ArchitectureSingle piece
OpticsAspheric, bifocal
MaterialHydrophilic
Water content, %26
Chemistry of raw materialHEMA-MMA
Haptics architectureOpen
Haptics thin, mm0,281
Vault, °5
Optical diameter, mm6
Total diameter, mm13
Incision size, mm1,8
Diopters, D+10 - +35; +3,75 for near view range
Increment, DPer 0,5 D

Aquamarine

ArchitectureSingle piece
OpticsAspheric, monofocal
MaterialHydrophilic
Water content, %22/26
Chemistry of raw materialHEMA-MMA
Haptics architectureOpen
Haptics thin, mm0,290
Vault, °0; 5
Optical diameter, mm6
Total diameter, mm11
Incision size, mm1,8
Diopters, D+6 - + 35
Increment, DPer 0,5 D

Citrine

ArchitectureSingle piece
OpticsAspheric, monofocal
MaterialHydrophobic
Water content, %≤ 0,5
Chemistry of raw materialTerpolymer and polyacrylate; yellow
Haptics architectureType С
Haptics thin, mm0,281
Vault, °5
Optical diameter, mm6
Total diameter, mm13
Incision size, mm2,2
Diopters, D+6 - + 35
Increment, DPer 0,5 D

Azurit

Architecture3 pieces
OpticsAspheric, monofocal
MaterialHydrophobic
Water content, %≤ 0,5
Chemistry of raw materialTerpolymer and polyacrylate
Haptics architectureType С; Polyvinylidene fluoride (PDVF)
Haptics thin, mm0,200
Vault, °5
Optical diameter, mm6
Total diameter, mm13
Incision size, mm2,2
Diopters, D+6 - + 35
Increment, DPer 0,5 D

Diopside

ArchitectureSingle piece, double lens
OpticsAnterior - aspheric monofocal, Posterior – toric and multifocal adding
MaterialHydrophilic
Water content, %26
Chemistry of raw materialHEMA-MMA
Haptics architecture3 loops haptics
Haptics thin, mm0,280
Vault, °0
Optical diameter, mm6
Total diameter, mm11
Incision size, mm2,2
Diopters, D+10 - +35
Increment, DPer 0,5 D