timeXL

Scleral lenses

The TimeXL is an innovative mini-scleral lens from Menicon BV. It is the first scleral lens that has been produced with a bitangential periphery. Research shows that the shape of the limbus and the sclera is typically linear and not curved.1 Furthermore, in 95% of cases, the scleral surface is toric and not spherical. This was the basis for the design of the TimeXL. The goal of the bitangential design was to realise an optimal distribution of pressure of the lens on the conjunctiva. This results in higher tolerance, which allows for longer daily use.2,3

Design

For the TimeXL, two important innovations were combined for maximum comfort and optimum lens performance. More specifically, the periphery is produced linearly and torically (bitangential). The toric periphery of the lens can be precisely controlled in both flat and steep meridians and the sclera is outlined for a simple fit and stability. This allows the cornea to be optimally bridged.3

The toricity is limited to just the periphery of the lens: the back surface geometry of the optical zone is spherical. If necessary, the front of the TimeXL’s optical zone can be fitted with a corrective cylinder.

Product specifications

 Sagittal height

3000 to 4600 μm in increments of 100 μm
Tangent to flat and steep
 meridian
Both meridians available from 28° to 50°
 in increments of 2°

 Base curve

7.4 to 9.2 mm in increments of 0.2 mm
Diameter 14.0 to 17.5 mm in increments of 0.5 mm
Power -25.00 to +25.00 D in increments of 0.25 D

 Front toric parameters

Axis Cylinder power
0° to 180° in
 increments of 1°
-0.75 to -3.00 D in
 increments of 0.25 D
Material Menicon Z

Handling tint

Clear

  1. Van der Worp E, Graf T, Caroline PJ. Exploring beyond the corneal borders. Contact Lens Spectrum 2010; 25 (6):26–32.
  2. Van der Worp E. A Guide to Scleral Lens Fitting (monographyonline). Pacific University Common Knowledge: Books and Monographs. 2010. Available at: http://commons.pacificu.edu/cgi/viewcontent.cgi?article=1003&context=mono. Consulted on 13 June 2013.
  3. Visser, MedicalApplications and Outcomes of Bi-tangential Scleral Lenses. Optometry and Vision Science VOL. 90. No.10, October 2013.

Menicon Co., Ltd.

21-19, Aoi 3, Naka-ku, Nagoya 460-0006 Japan

Tel +81-(0)52-935-1515

overseas-contact@menicon.co.jp

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