/**
 * @name VisionBaseCodes
 * @description A coded concept listing the base codes.
 * @description up | down | in | out
 * @see <a href="https://hl7.org/fhir/R4/valueset-vision-base-codes.html">VisionBaseCodes</a>
 * @version R4
 * @author Claudia Alarcón Lazo
 */
export type VisionBaseCodesType = 'up' | 'down' | 'in' | 'out';