Measuring the eye pressure cannot cause an intraocular lens implant to shift out of position. What you are describing sounds like negative dysphotopsia, or seeing a dark crescent image off to the side. This happens in implant surgery which was perfectly performed, and is not well understood. Try to ignore the dark crescent image, and it may resolve. If not, your doctor may want to consider one of the surgical remedies recommended by Dr. Samuel Masket.
Dr. Samuel Masket is a specialist in cataract surgery. His office number is (310) 229-1220.
Your response to "Orachella" re: dark crescent image, mentions the name Dr. Samuel Masket. What is this doctor's specialty, and how does one get more information about him?
Thanks for the information. Now that I know what it is and that it may resolve I feel reassured. In the meantime I have found that wearing glasses with a wide dark frame helps to make the crescent area less obvious to me.