adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
wide open (eyes); large and bright (eyes)
Describes eyes that are wide open, clear, and attractive, often used for children or in a cute context. Can be used adverbially with と or as a する verb.
その人形は目がパッチリしている。
That doll has large, bright eyes.
赤ちゃんがパッチリと目
The baby opened its eyes wide.