Question about something my pain doctor did

I happened to have a headache the day of my ESI follow up so I was
wearing very dark sunglasses. (Let's leave out the part where he did
not know about the procedure he performed and the complication he
reported to my wife.) I tell him I have a headache. He takes my pulse
and tells me it is 104, way too high. I remind him I have a headache
and my pulse and blood pressure often go up. He then asks me why I am
wearing my sunglasses during the exam. I again tell him I am having a
headache and my eyes are light sensitive. He asks me to take them off.
He looks at my eyes and has me follow his fingers. What was he
checking for with the eye-finger test?

( I am a little concerned he does not know about light sensitivity
with migraines - it is documented in my records)

Mike
.