LRI

Description

Returns the length (in degrees) of opposite single limbal relaxing incisions (LRI) for an eye with up to 3 D of residual corneal astigmatism. The calculation uses a mix of Donnenfeld (DONO) and Nichamin (NAPA) nomogram.

Background
Limbal relaxing incisions relax the steep meridian of corneal astigmatism and allow the eye to heal into a more spherical shape. This is to optimize the unaided visual acuity for IOL patients by reducing the residual astigmatism to within about 0.5D post-operatively. The LRI is expected to be placed about 0.5mm inside the limbus, the area where the clear cornea meets the sclera. The depth of the cornea should be around 600mcm (use fixed-depth blade), the positions should be carefully marked prior to the incisions.

URL

POST https://www.zubisoft.com/api/lri

Permission

Standard authentication with public key, hashed private key and user key is required.

Parameters

Field	Description
manifest_cylinder_post	-1.75 (postop manifest cylinder power, range: 0.5 - 3.0 D)
manifest_ax_post	70 (postop manifest cylinder axis)
age	75 (in years)


{
    "manifest_cylinder_post": -1.75,
    "manifest_ax_post": 70,
    "age": 75
}


curl --location --request POST 'https://www.zubisoft.com/api/Lri' \
--header 'Content-Type: application/json' \
--header 'X-Public-Key: yourPublicKey' \
--header 'X-User-Key: yourUserKey' \
--header 'X-Private-Key: hashOfYourPrivateKey' \
--data-raw '{
    "manifest_cylinder_post": -1.75,
    "manifest_ax_post": 70,
    "age": 75
}'

Response

The response includes the following values:

Table
JSON

Name	Format [Unit]	Example	Comment
lri	Integer [degree]	55	Length in degrees of the LRIs (30 degrees = 1 clock hour)


{
    "lri": 55
}