Today his eye saw a weird picturimage. Today his eye saw a weird image.

picture is like a drawing or something displayed on a screen. Image is more generic and better for this case.

Today his eye saw a weird picture in his eye. Today he saw a weird picture in his eye.

InDuring his childhood his eye was damaged. During his childhood his eye was damaged.

InDuring his childhood his eye was damaged. During his childhood his eye was damaged.

Now the eye'Recently his retina wasbecame detached. Recently his retina became detached.

"Now" is present tense, "was" is past tense, they don't go together. You don't need to specify "eye's retina", people understand you're talking about the eye when you talk about the retina

Now the eye's retina wais detached. Now the eye's retina is detached.

The first operation was a completed perfectly! success. The first operation was a complete success.

But my husband is soa very nervous person! But my husband is a very nervous person!

But my husband is souch a nervous person! But my husband is such a nervous person!