Is Constantly looking at an Iphone cause double vision?

Is Constantly looking at an Iphone cause double vision?

Added (1). All day long last Thursday to be exact.

Added (2). Anyone else like to answer?

Yes

When your eyes get temporarily locked into the close vision position it's a sure sign you have to give the phone a break and watch what is happening in real life all around you.

Yes - I think the background lighting is hard for the eye to focus on and encourages a vision that can't focus well without the bakground lighting.

It can, yes,

It CAN cause blurry vision.
It CAN cause jittery, shaky vision.

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