Vision Screening Data Model — Sample ERD

Sample entity-relationship model authored by Edgent LLC (SDVOSB, Bastrop TX) illustrating our data-modeling approach for a statewide K-12 vision screening data collection platform: student record continuity across LEA enrollments, DSHS-aligned screening workflow (OD/OS acuity, exceptions), SB 12 consent tracking, referral and follow-up lifecycle, campus-to-LEA certification, and full auditability.

• erd.md — the entity-relationship diagram (Mermaid) with design notes
• schema.sql — illustrative PostgreSQL DDL for the core entities

This is a sample for evaluation purposes; it is not the production schema of any Edgent system.