| Clue | Source | Date |
|---|---|---|
| Herman ___, Dutch ophthalmologist known for his visual acuity testing | New York Times | 31 Jan 2026 |
| Herman whose chart is topped with a giant "E" | LA Times Daily | 09 Apr 2024 |
| _chart (eye test tool) | ||
| ___ chart (eye test tool) | ||
| Dutch doctor known for his optotypes | Newsday | 29 Oct 2022 |