Specifications
- 包装规格: 1片装
- 材质: Hexafocon A (HA)
- 透氧率 (于 -3.00D): 100
- 直径 (毫米): 10.0 & 11.6
- 目标矫正度数: -1.00 至 -5.00 (0.25 度间隔)
最高至 -7.00
- 角膜曲率值: 38.0 D 至 47.0 D
- 边缘抬升: 标准, +10微米, -10微米
- 角膜散光: 2.00D 至 4.00D
Description
Precision Alignment: OCUVIQ™ dk-4t Ortho-K Toric Lens
The OCUVIQ™ dk-4t is a specialized Toric Orthokeratology (Ortho-K) lens designed for users with moderate to high corneal astigmatism or asymmetric peripheral corneal shapes. The "t" in the model name indicates its dual-axis design. For eyes with high astigmatism, standard symmetrical lenses often struggle to center properly, leading to ghosting or decentered treatment. The dk-4t utilizes asymmetrical edge geometry to perfectly match the unique curves of an astigmatic cornea, ensuring precise treatment delivery.
Core Technology & Benefits
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Toric Alignment Technology: The lens features different curvatures in two perpendicular axes. This design acts like a "lock and key" to fit the football-like shape of an astigmatic cornea, preventing the lens from tilting, sliding, or leaking light during sleep.
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Flagship dk-4 Oxygen Permeability: Inheriting the industry-leading Dk value of the dk-4 series, this lens ensures maximum oxygen transmission to the cornea even in a closed-eye environment, providing the highest safety margin for complex fittings.
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Optimized Defocus Ring: Stable centration allows the dk-4t to create a more uniform and complete peripheral defocus ring on the cornea. For astigmatic children, this provides a more robust signal to slow down axial elongation and control myopia progression.
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Tear Fluid Dynamic Balance: Even on an asymmetrical corneal surface, the precision reverse-geometry design guides tear fluid to create even hydraulic pressure, achieving stable and efficient physical reshaping.
QNA
1. Why do users with high astigmatism need the dk-4t instead of a standard version?
Astigmatism means the cornea is curved differently in different directions. A standard lens may rock like a seesaw on such a surface, causing the treatment zone to drift away from the pupil. The dual-axis design of the dk-4t ensures even pressure across four points, guaranteeing perfect centration.
2. Does the dk-4t reshape the eye faster than the standard version?
The speed of reshaping is similar, but for astigmatic users, the quality of the result is superior. It prevents visual issues like glare or ghosting caused by decentered treatment, resulting in much sharper daytime vision.
3. Does this lens offer extra benefits for myopia control?
For astigmatic patients, the stable centration of the dk-4t ensures that the defocus zone is perfectly centered around the visual axis. This stable signal is key to controlling myopia, often resulting in better outcomes than a decentered standard lens.
4. Does the complex design of the dk-4t increase foreign body sensation?
No. Although the design is more intricate, the lens edges are highly polished and ultra-thin. Because it fits your corneal shape more naturally, it reduces abnormal friction with the eyelids, typically leading to excellent comfort once adapted.
More detail about Intan Optometry Clinic
Malaysia
