Electronic keratometer SW-100

The measurement of the curvature of the anterior surface of the cornea by the keratometer can provide a basis for selecting the appropriate base curve of the soft contact lens. It can also be used to check the corneal astigmatism through the keratometer to provide a reference for optometry.

The keratometer is used to measure the curvature of each meridian on the front surface of the cornea that is about 3mm in the center, that is, the radius of curvature and the curvature, so as to determine whether the cornea has astigmatism, astigmatism, and axial direction.


Product Description

The clinical functions of the keratometer are as follows:

1. During the fitting process of contact lenses, the base curve of the lens can be selected according to the radius of curvature of the principal meridian of the anterior surface of the cornea of ​​the customer.

In selecting the base curve of the lens, the base curve of the lens is equal to or slightly larger than the radius of curvature of the principal meridian of the anterior surface of the cornea. The following formula can be used to obtain:

BC = the sum of the radii of curvature of two mutually perpendicular principal meridians/2×1.1

For example, the curvature radii of two principal meridians that are perpendicular to each other are measured to be 7.6 and 7.8.

BC=7.6+7.8/2×1.1 =8.47

2. Evaluate the tightness of contact lenses after wearing.

When testing, make the wearer blink. If the wearer is well worn, the visual mark will always be clear and unchanged;

If worn too loosely, the image will be clear before blinking, and the image will be blurred immediately after blinking, and it will be clear again after a while;

If it is worn too tightly, the image will be clear before blinking, and the blur will be restored for a while.

3. A keratometer can be used to detect the degree of astigmatism, axial direction and distinguish the type of astigmatism.

If there is astigmatism in the optometry, use a keratometer to detect astigmatism, indicating that the astigmatism is all intraocular astigmatism.

If there is astigmatism in optometry, astigmatism is also detected with a keratometer, and the astigmatism of the two is equal, and the axial direction is the same, indicating that the astigmatism of the eye is all corneal astigmatism.

If the astigmatism in the optometry is not equal to the astigmatism detected by the keratometer and the axis is not consistent, it means that the astigmatism is a mixture of corneal astigmatism and intraocular astigmatism.

If there is no astigmatism in optometry, use a keratometer to detect astigmatism, which means that the degrees of corneal astigmatism and intraocular astigmatism are equal, and the signs are opposite, the axis is the same, and the two cancel each other out. This astigmatism can be corrected with a spherical lens.

4. For certain corneal diseases, such as keratoconus and keratoconus, the keratometer can be used as a diagnostic basis. The measurement of the keratometer is required for the determination of the degree of implantation before the implantation of the intraocular lens and the design and result analysis of various refractive operations. In addition, you can learn about the secretion of tears and so on.

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Product Advantages

The electronic keratometer SW-100 integrates electronics and optics. It is mainly used to measure the corneal curvature radius and diopter, and can wirelessly output print data.

Technical Parameter

Measuring range:

Radius of curvature 6.5mm-9.5mm

Measurement deviation:

Radius of curvature ±0.05mm

Resolution of radius of curvature:

0.01mm

The deviation of the principal meridian axis measurement of the curvature meter:

± 2°

Output device:

Wireless infrared thermal printer

The eyes can be directly observed through the screen

Display method:

Radius of curvature display and diopter display two

weight:

<0.5Kg

size:

240mm×90mm×60mm

power:

500mW+15%


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