Use of electronic health records to examine margin-to-reflex distance in patients without eyelid conditions affecting position
Jason W Zhou, Fritz Gerald P Kalaw, Bharanidharan R Saseendrakumar, Sally L Baxter, Catherine Y Liu, Bobby S Korn, Don O Kikkawa · 2026
Read Use of electronic health records to examine margin-to-reflex distance in patients without eyelid conditions affecting position by Jason W Zhou, Fritz Gerald P Kalaw, Bharanidharan R Saseendrakumar, Sally L Baxter, Catherine Y Liu, Bobby S Korn, Don O Kikkawa (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13249627.txt.
Description
Zhou and colleagues mined medical records for a reference range for eyelid position, in a 2026 study. The measure, called MRD1, is the distance from the light reflex in the pupil to the upper eyelid edge, used when planning eyelid surgery. The team extracted nearly twelve thousand measurements from more than six thousand adults at one academic center, excluding anyone with conditions that move the lid.
The distance shrank by roughly two tenths of a millimeter per decade of age. It also differed measurably by sex and by racial group. The authors offer the values as a demographic-aware reference set, so surgeons can judge an individual patient's lid position against people actually like them.
Catalog record
| CREATOR | Jason W Zhou, Fritz Gerald P Kalaw, Bharanidharan R Saseendrakumar, Sally L Baxter, Catherine Y Liu, Bobby S Korn, Don O Kikkawa |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 21 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |