Atlas
The same lid before and after the test
External photographintermediateThe same patient: panel a before, panel b after a pharmacological test of the neuromuscular junction.

Two panels from the source figure, labelled a and b.
Diagnosis
Ptosis of myasthenia gravis, reversed on testing
- Right partial ptosis in the first panel
- Lid position restored in the second
- Compensatory left lid retraction settles as the right lid lifts
- Pupils unchanged