* ตาหวาน (taa waan) - This literally translates to "sweet eyes." It implies that the person's eyes are charming, gentle, and attractive. This is a very common and generally complimentary way to describe beautiful eyes.
* ตาสวย (taa suay) - This literally translates to "beautiful eyes." This is a straightforward and simple way to say someone has beautiful eyes.
* มีดวงตาที่สวยงาม (mee duang-taa tee suay ngaam) - This translates to "have eyes that are beautiful." This is a more formal and elaborate way to say it.
* ตาเป็นประกาย (taa bpen bpra-gaai) - This translates to "sparkling eyes." It implies that the person's eyes are bright, lively, and attractive.
If you want to tell a girl she has pretty eyes, ตาหวาน (taa waan) or ตาสวย (taa suay) are the most natural and commonly used options.