Corneal abrasion 18mos ago. sometimes wake up w/ blurred vision in eye; feels scratchy sometimes; gets better in 1 min. should i visit eye doc again?

Yes and Soon: Corneal abrasions are common eye injuries that frequently result from eye trauma, foreign bodies, and improper contact lens use. Patients typically present with severe eye pain and a foreign body sensation. Most abrasions heal fully within 24 hours, or what is called "spontaneous corneal abrasions are also known as recurrent erosions(no immediate antecedent injury or foreign body).

Recurrent errosion: Sounds like you are having a recurrent corneal erosion. This is where the epithelium, skin layer, that was scratched (the abrasion) does not completely heal down and will recurrently and spontaneously slide or come up and cause pain, blurred vision. With time it will stick or heal back down. Treatment is lubricate with artificial tears during the day and then and ointment or gel at bedtime.