“How many optometrists does it take to screw in a light bulb? 1 or 2? 1? or 2?”

The traditional lightbulb joke has a popular optometrist version that has been printed on many images. The answer—1 or 2?—is a joke on an optometrist changing lenses and asking this question of a patient.
   
“Q. How many optometrists does it take to screw in a light bulb? A. You tell me, is it one or two? Two or one?... http://bit.ly/an1MJO” was posted on Twitter by Shannon Franklin on April 19, 2010. “How many optometrists does it take to change a lightbulb? 1 or 2. Now 1… or 2” was posted on Reddit—Jokes on February 20, 2016.
     
     
Twitter
Shannon Franklin
@shannoneyedoc
Q. How many optometrists does it take to screw in a light bulb? A. You tell me, is it one or two? Two or one?... http://bit.ly/an1MJO
12:36 PM - 19 Apr 2010
   
Twitter
Steve Knight
@KnighterByter
How many optometrists does it take to change a light bulb? One, but can you see better now? or before? now? or before?
10:35 AM - 29 Jul 2010
     
Twitter
Andy Lester
@petdance
How many optometrists does it take to change a light bulb?  One, or two?  One, or two?  One, or two?
10:19 PM - 17 Sep 2010
     
Twitter
Burnaby Vision Care
@burnabyvision
Eye joke of the day:
Q - How many optometrists does it take to screw in a light bulb?
A - You tell me.. is it one or two?
4:41 PM - 24 Feb 2011
 
Reddit—Jokes
Posted by u/donquixote1991 February 20, 2016
How many optometrists does it take to change a lightbulb?
1 or 2. Now 1… or 2.
     
Reddit—Jokes
Posted by u/Ganjisseur April 23, 2016
How many optometrists does it take to screw in a light bulb?
“Put a lightbulb on”
One? Or two?
One?
....
Or two?
     
Google Books 
3000 Jokes, 2997 Laughs
By Mike Haskins
London, UK: Portico
2017
Pg. ?: 
Q: How many optometrists does it take to change a light bulb?
A: One . . . or two. One . . . or two.
   
Google Books
Uncle John’s Actual and Factual Bathroom Reader
By Bathroom Readers’ Institute
San Diego, CA: Portable Press
2018
Pg. ?:
Q: How many optometrists does it take to change a light bulb?
A: Is it one, or two? One… or two?
 
Reddit—Jokes
Posted by u/VitaMachina May 31, 2018
How many optometrists does it take to screw in a lightbulb?
One… Or two?
 
Reddit—Jokes
Posted by u/R4nd0m-man December 25, 2019
How many optometrist does it take to screw in a light bulb?
1… or 2?? Or 1? Or 2?
   
Reddit—Jokes
Posted by u/Sir_Fuzzums January 27, 2019
How many optometrists does it take to screw in a lightbulb?
1 or 2? 2 or 3?
 
Reddit—Jokes
Posted by u/keratoconusgroup July 17, 2019
How many optometrists does it take to screw in a light bulb?
1 or 2?
1? or 2?