價格：免費
檔案大小：7.1 MB
版本需求：需要 iOS 11.4 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Calculate VA gives you a quick and accurate way to easily convert between common measures of visual acuity. Conversions are made instantly when you enter one of the visual acuity measurements and press "Calculate". Choose from:
* Snellen 20
* Snellen 6
* Decimal
* logMAR
* ETDRS Letters
This is useful for any optometrist or ophthalmologist who needs to convert fluidly between all 5 of the common visual acuity measures.
支援平台：iPhone, iPad