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@iwanglang/observation-visual-acuity@0.0.8

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iwanglang/observation-visual-acuity
This package works with Node.js, Bun, BrowsersIt is unknown whether this package works with Cloudflare Workers, Deno
It is unknown whether this package works with Cloudflare Workers
This package works with Node.js
It is unknown whether this package works with Deno
This package works with Bun
This package works with Browsers
JSR Score
94%
Published
a year ago (0.0.8)

IWangLang: Observation Visual Acuity

🚀 Quick Start

Install:

# npm
npm i @iwanglang/observation-visual-acuity

# yarn
yarn add @iwanglang/observation-visual-acuity

# jsr npm
npx jsr add @iwanglang/observation-visual-acuity

# jsr yarn
yarn dlx jsr add @iwanglang/observation-visual-acuity

Import:

// ESM / Typescript
import { ObservationVisualAcuity } from "@iwanglang/observation-visual-acuity";

// CommonJS
const {
  ObservationVisualAcuity,
} = require("@iwanglang/observation-visual-acuity");

🥸 Get Snellen Scale for create Chart

import { ObservationVisualAcuity } from "@iwanglang/observation-visual-acuity";

const visualAcuity = new ObservationVisualAcuity();
const snellenChartScaleFoot = visualAcuity.getSnellenChartScales("foot");
const snellenChartScaleMetre = visualAcuity.getSnellenChartScales("metre");

console.log(snellenChartScaleFoot[0]);
// { "display": "20/200", "numerator": 20, "denominator": 200, "LogMAR": 1.00 }

console.log(snellenChartScaleMetre[0]);
// { "display": "6/60", "numerator": 6, "denominator": 60, "LogMAR": 1.00 }

use getSnellenChartScales function to get list of snellen scales for prepare data of Visual Acuity that will save into server

Example for Snellen Chart

Foot Metre LogMAR
20/200 6/60 1.00
20/160 6/48 0.90
20/125 6/38 0.80
20/100 6/30 0.70
20/80 6/24 0.60
20/63 6/18 0.50
20/50 6/15 0.40
20/40 6/12 0.30
20/32 6/9.5 0.20
20/25 6/7.5 0.10
20/20 6/6 0.00
20/16 6/4.8 −0.10
20/12.5 6/3.8 −0.20
20/10 6/3 −0.30

🥸 Convert Snellen to LogMAR

import { ObservationVisualAcuity } from "@iwanglang/observation-visual-acuity";

const visualAcuity = new ObservationVisualAcuity();
const snellenChartScaleMetre = visualAcuity.getSnellenChartScales("metre");

console.log(snellenChartScaleMetre[0]);
// { "display": "6/60", "numerator": 6, "denominator": 60, "LogMAR": 1.00 }

// LogMAR VA = 0.1 + LogMAR value of the best line read – 0.02 X (number of optotypes read)
// default optotypesRead is -2
console.log(`LogMAR is ${visualAcuity.convertSnellenToLogMAR(snellenChartScaleMetre[0].numerator, snellenChartScaleMetre[0].denominator)}`);
// LogMAR is 1

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Add Package

deno add jsr:@iwanglang/observation-visual-acuity

Import symbol

import * as observation_visual_acuity from "@iwanglang/observation-visual-acuity";
or

Import directly with a jsr specifier

import * as observation_visual_acuity from "jsr:@iwanglang/observation-visual-acuity";

Add Package

pnpm i jsr:@iwanglang/observation-visual-acuity
or (using pnpm 10.8 or older)
pnpm dlx jsr add @iwanglang/observation-visual-acuity

Import symbol

import * as observation_visual_acuity from "@iwanglang/observation-visual-acuity";

Add Package

yarn add jsr:@iwanglang/observation-visual-acuity
or (using Yarn 4.8 or older)
yarn dlx jsr add @iwanglang/observation-visual-acuity

Import symbol

import * as observation_visual_acuity from "@iwanglang/observation-visual-acuity";

Add Package

vlt install jsr:@iwanglang/observation-visual-acuity

Import symbol

import * as observation_visual_acuity from "@iwanglang/observation-visual-acuity";

Add Package

npx jsr add @iwanglang/observation-visual-acuity

Import symbol

import * as observation_visual_acuity from "@iwanglang/observation-visual-acuity";

Add Package

bunx jsr add @iwanglang/observation-visual-acuity

Import symbol

import * as observation_visual_acuity from "@iwanglang/observation-visual-acuity";