Special & custom · Scleral

KeratoGenius Custom Scleral

A user-friendly scleral lens that lets practitioners tailor the fit across four distinct areas: Central, Intermediate, Peripheral and Edge.

Customised product

Dk: 141
Wear: Daily
Fit zones: 4

How it works

A tear reservoir, held without touching the cornea.

“This large-diameter rigid contact lens, known as a scleral lens, works by resting on the sclera, the tough, white outer layer of the eye which is less sensitive than the cornea. Because the lens extends beyond the limbus … and vaults over the cornea, it maintains a tear reservoir without touching the cornea or limbus.”

Scleral lenses are applied to the eye with a non-preserved saline solution, creating a thin cushion of fluid between the lens and the eye.

Scleral lens held between thumb and finger — Scale in hand

Customisation

Eight design options. Four advanced variants.

The system accommodates Multifocal, Oblate, Front Toric, Toric Haptic, Quadrant Specific and Controlled Peripheral Recess (CPR) designs.

01Spherical

02Multifocal

03Anterior toric

04Toric haptic (periphery)

05Oblate

06Multifocal oblate

07Quadrant-specific

08Controlled peripheral recess (notch)

Render: eight-quadrant haptic scleral lens — AdvancedEight-quadrant haptic

Render: micro-vault haptic scleral lens — AdvancedMicro-vault haptic

Render: dual sagittal depth scleral lens — AdvancedDual sagittal depth

Render: optical prism custom scleral lens — AdvancedOptical prism

The scleral range

Three customised scleral lenses. Every KeratoGenius product is a customised product.

All customised

KeratoGeniusCustomisedScleralKeratoGenius McAsfeer* Custom Scleral Lens (KGMc)

Daily-wear clear and blue-handling-tinted customised 4-quadrant rigid toric haptic mini scleral lens with 10 points of customisation.

KeratoGeniusCustomisedScleralKeratoGenius McAsfeer* Advance Custom Scleral Lens (KGMc Advance)

As KGMc, with a special surface treatment: a 4-quadrant rigid toric haptic mini scleral lens with 10 points of customisation.

KeratoGeniusCustomisedScleralKeratoGenius McAsfeer* Eight Custom Scleral Lens (KGMc 8)

Customised 8-quadrant rigid toric haptic mini scleral lens with 24 points of customisation and a special surface treatment.

Fitting zones

Tailor each zone. Read the vault.

Central250–300 µmSAG 4250–6750 µm

Intermediate150–175 µm± 300 µm

Peripheral70–75 µm± 300 µm · sph / quad

EdgeNot stated± 300 µm · sph / toric / quad

Middle column: suggested vault by zone. Right column: modification range. Oblate CCR −70 / −110 / −150 / −190 / −230 µm.

Zone diameters

Specification

Parameters & materials

Geometry & parameters5 values

Diameter	14.50–16.40mm
SAG (prolate)	3600–6600µm
Sphere	±40.00D
Cylinder	−6.00D
Slit marks	3 and 9 o’clock · two slits at 6 o’clock
Fitting zones	Central 7.5 · Mid-periphery 9.5 · Limbus 12mm · Haptic

MaterialsDk 100 to 180

Material	Rigid gas-permeable
Dk	100 to 180

Modification rangeCurrent range

Intermediate	±300µm
Peripheral	±300µm · spherical or quadrant
Edge	±300µm · spherical / toric haptic / quad
Oblate CCR	−70 / −110 / −150 / −190 / −230µm

Wear & packaging2 values

Modality	Daily wear
Packaging	Blister

Ask a fitting consultant

For the wearer

The KeratoGenius starter kit.

A storage bag with a lens case, insertion and removal tools, saline, solution and a user guide.

Lens care for scleral lenses

Scleral lens FAQ

Questions before a trial

All scleral lens questions

How do scleral lenses work?

Most contact lenses sit on the corneal surface itself. Scleral lenses are larger and wider, resting on the sclera (the white part of the eye). The lens then vaults over the cornea, leaving a fluid-filled chamber between the lens and the surface of the eye. This design helps hydrate the eye and compensates for irregularities in the shape of the corneal surface.

Are scleral lenses comfortable?

Initially, there may be a sense of awareness with scleral lenses, or “knowing that the lens is there”. It can take some time to acclimate to this feeling, especially if you have never worn a contact lens before. In the long run most patients report that scleral lenses are more comfortable than other types of rigid lenses, to the point where they are hardly noticeable. The design of scleral lenses helps reduce corneal irritation and keeps the eye hydrated and healthy. They are also custom-designed to fit the unique shape of each individual eye, factors that provide for all-day comfort. While some specialty contact lenses are suitable to wear overnight, scleral lenses are not. It is advised to remove them before going to bed each night.

How many hours a day can I wear my scleral lenses? Can I sleep with them?

Most patients wear their lenses all day, from the time they wake up until they prepare to go to sleep. Sleeping with the scleral lenses on for the whole night is not recommended, as it may lead to lack of oxygen to the cornea, congestion on the sclera and a red eye. Changing the saline at specific intervals is recommended.

Can scleral lenses fall out of the eye during outdoor or sports activities?

No. Scleral lenses attach to the sclera (the white part of the eye) and create suction, so they do not fall out or get displaced during physical activities unless you are actively trying to remove them.

Are there any complications associated with wearing scleral lenses?

Any contact lens brings with it a risk of eye infections. However, these complications, when they do occur, are almost always a result of poor lens care or lens hygiene, rather than the fault of the lenses themselves. If you follow the lens-care habits recommended by your eye care practitioner you should have no reason for concern.

I have small eyes. Will I have a problem with insertion and removal of scleral lenses?

All of our scleral lenses are customised for each individual eye. You should not have any difficulty during insertion and removal. We allow a great deal of time not only in fitting these lenses but also in instructing patients on proper insertion and removal techniques.

What happens if my prescription changes? Do I need a new pair of scleral lenses?

The aim of prescribing scleral lenses is not to get rid of your spectacles. Scleral lenses reshape the irregular corneal surface by maintaining a saline reservoir over the cornea, and the required power is incorporated in the lens as needed on the day of examination. Any later change in refractive power (which could be after a year or more) can be prescribed as a spectacle over the scleral lens.

Resources

Technical Literature

Reference material from Silver Line Laboratories for eye care professionals.

PDF For lens wearers and practitioners

Scleral Lens User Guide

Step-by-step handling, cleaning, filling and insertion of a McAsfeer* scleral lens with a suction holder or with the fingers, removal, a wearing schedule, and do’s and don’ts.

PDF · 28 pages · 3.8 MB Download the Scleral Lens User Guide

PDF For eye care practitioners