From - £74.53

SOClear corneo-scleral lenses are designed to distribute pressure evenly over the corneal and scleral surfaces, delivering a unique combination of visual performance consistent with RGP lenses along with comfort and stability equal to hydrogel materials.


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When to use

  • Patients intolerant to the discomfort of small diameter RGP’s
  • Patients wishing for better vision than a soft KC design
  • Patients who have complex corneal profiles which are too difficult to fit with an RGP
  • Patients with high levels of regular or irregular astigmatism who have tried other options and failed


Materials:Optimum Extra / Boston XO
TintOptimum Extra – blue and clear
Base curve7.10 to 10.50mm (0.01mm steps)
Optic zone9.60mm
Diameter13.30 to 15.00mm
BVP+20.00 to -25.00D in 0.25D Steps
Peripheral CurvesFull range of curves to match flat and steep scleral profiles (20 steps flatter or steeper)

Fitting Guide

Ideal fit
  • Alignment with the scleral conjunctiva, with no standoff or impingement
  • Central alignment with at least 1.5-2mm band of mid-peripheral corneal clearance
  • 1.00-1.25 mm of scleral coverage
  • Maximum 0.25mm of movement on blink
  • The lens should be easy to remove, with no signs of adherence, and there should not be any significant corneal staining 
Initial trial lens selection
  • Measure HVID
  • For average corneal diameters (11.5 – 12mm), select a lens as close to the mean K as possible
  • For large corneal diameters (in excess of 12 mm), select a lens which is 1 Dioptre steeper than the mean K
  • For small corneal diameters (less than 11.5mm), select a lens which is 1 Dioptre flatter than mean K
  • Insert the lens and assess the fluorescein fit 
Sag and peripheral fit
  • If there is central corneal touch then the lens is has too low a sag, select a steeper lens.
  • A flat lens will flare away from the sclera and will often be uncomfortable (fig. 2)
  • A steep lens may cause vessel blanching (fig 3)
  • Aim for the flattest periphery that does not cause edge lift /discomfort /lens movement over 0.25mm and does not have central touch
    • Perform an over-refraction with the chosen lens
Mid-peripheral fit
  • The ideal lens fit has a 1.5-2mm band of mid-peripheral clearance
  • If the chosen lens gives too little mid-peripheral clearance order the lens with a flatter central curve (two steps initially)
  • If there is excessive mid-peripheral clearance then order the lens with a steeper central curve. (two steps initially)
  • The power of the lens will need to be altered using SAMFAP rule. Conveniently the lenses in the fitting set differ by 0.50D


Please specify:

  • The diagnostic lens that gives the ideal peripheral fit.
  • Any changes to the central curve required to alter the mid-peripheral fit
  • Total diameter: select a diameter that provides 1.00 to 1.25mm of lens coverage beyond the HVID. Bear in mind, large changes may affect the SAG of the lens
  • Material
  • Rx determined from diagnostic lens power, over-refraction and SAMFAP rule.