וְעֵינֵ֥י לֵאָ֖ה רַכּ֑וֹת וְרָחֵל֙ הָֽיְתָ֔ה יְפַת־תֹּ֖אַר וִיפַ֥ת מַרְאֶֽה׃
Y los ojos de Lea eran tiernos, pero Rachêl era de lindo semblante y de hermoso parecer.
Rashi
רכות TENDER — She thought she would have to fall to the lot of Esau and she therefore wept continually, because everyone said, “Rebekah has two sons, Laban has two daughters — the elder daughter for the elder son, the younger daughter for the younger son” (Genesis Rabbah 70:16).
Da'at Zekenim
ועיני לאה רכות, “Leah’s eyes were soft, so that due to her beautiful eyes she appeared beautiful all over,”[the expression רך appears next to טוב, “good, when” the calf served by Avraham to the angels in Genesis 18,7 is described) in contrast to Rachel, whose body was beautiful, but whose eyes detracted from this as she cried a lot, fearing that her lot would be to be married to Esau after Yaakov would divorce her due to her barrenness. (No source quoted for this unusual interpretation)
Rashbam
רכות, beautiful; our sages in Taanit 24 say that when a prospective bride has beautiful eyes, the bridegroom need not have the rest of her body checked out for possible blemishes. Black eyes are not considered as beautiful as white ones. [I suppose the reference is to blue ones. Ed.]