Corneal curvature meterBL-8002

Since the corneal refractive power accounts for 2/3 of the total refractive power of the human eye, the curvature measurement of the cornea can understand the total refractive power of the human eye. At the same time, since most of the human eye astigmatism comes from the cornea, the corneal curvature readings are very good in terms of optometry and prescription analysis. important. In the computer optometry, the corneal curvature measurement has been mentioned


Product Description

 In this section, we will introduce the optical keratometer and its application. The keratometer uses the reflection properties of the cornea to measure its radius of curvature. The features of the keratometer are as follows: ①The eyepiece can be adjusted so that the examiner's eyes can be focused clearly. ②The jaw rest and headrest can be adjusted so that the subject’s head position can be fixed during the inspection; the handle can be moved up and down to adjust the height of the instrument so that the subject’s eyes are on the same level. ③Two degree wheels can measure the curvature of the two principal meridians. ④) There is an axial scale, which can express the position of the two main meridians, and the entire barrel of the curvature meter can be rotated. ⑤The cursor is projected to the cornea of the examinee; the focus control handle can be moved back and forth to focus the cursor on the cornea of the examinee clearly.

212

Product Advantages

① The eyepiece can be adjusted so that the examiner's eyes can be focused clearly.

② The jaw rest and headrest can be adjusted so that the subject’s head position can be fixed during the inspection; the handle can be moved up and down to adjust the height of the instrument so that the subject’s eyes are on the same level.

③ Two degree wheels can measure the curvature of the two principal meridians.

④ There is an axial scale, which can express the position of the two main meridians, and the entire barrel of the curvature meter can be rotated.

⑤ The cursor is projected to the cornea of ​​the examinee; the focus control handle can be moved back and forth to focus the cursor on the cornea of ​​the examinee clearly.

Normal corneal curvature readings can use the radius of curvature (mm) or the diopter (D). In optometry, it is generally more convenient to express the diopter, and it can directly provide the situation of corneal astigmatism, such as: 43.00 D@ 180/44.00 D@ 90, We can directly obtain the corneal astigmatism of 1.00 D.

The main value of the unit of diopter is that it is convenient for contact lens opticians to calculate the amount of residual astigmatism (wearing a hard spherical contact lens), because the refractive index of tears is very close to the refractive index of the corneal curvature calculated by the corneal curvature. The measured amount of astigmatism is similar to the neutralization amount of the "tear lens" after wearing a contact lens, so by comparing the amount of astigmatism measured by the keratometer with the amount of astigmatism measured by refraction, the residual astigmatism can be quickly estimated.


  • Previous:
  • Next:

  • Send your message to us:

    Write your message here and send it to us

    Send your message to us:

    Write your message here and send it to us