"educated eye" is correct and usable in written English.
You can use it when referring to someone who has knowledge and expertise in a particular field or discipline and is able to identify or detect something easily. For example, "The art history professor had an educated eye and could immediately recognize the style of the painting."
By now she was hunting with a more educated eye.
There are several guides to keeping an educated eye on your mortgage.
It provides a steady stream of coins; you provide an educated eye, and the two of you split the profits.
He devised subtle, colorless ensembles, the drape and shape of which sent coded messages to the educated eye.
Clark knows that the innocent eye sees nothing but he clearly fears what the educated eye claims to see now.
The first visitor to Yaxchilan coming with an educated eye was undoubtedly Edwin Rockstroh, an instructor at the Colegio Nacional, Guatemala City.
It is thus necessary to educate eye care providers and glaucoma patients about the available options of low vision assessment and low visual aids.
This flexible scheme will target deficiencies in eye care delivery with specifically trained personnel, thereby providing a better balance between the opportunity costs of educating eye care personnel for all possibilities and cost-effectiveness of outcomes.
Among Michael Grandage's many gifts as a director of Shakespeare — an educated scenic eye, a knack for casting and for pacing — the greatest is his clarity.
"If I can express it this way," he wrote, "they were my teachers of painting: They educated my eyes and continue to do so.
The more samurai films I watched, the more educated my eyes became to the particulars of the fencing; I came to see that the actors and fight choreographers altered styles to reflect the characters.
