1 Kings 8:52

“ That your eyes may be open to the supplication of your servant, and to the supplication of your people Israel, to listen to them whenever they cry to you.”

And Solomon's hope was that because YHWH's Central Sanctuary had again been established, the prayers of he and YHWH's people might be more efficacious whenever they cried to Him. ‘That your eyes may be open' takes up the thought of their being His people and His inheritance. That is why His eyes will be open towards them, not because of their own deserving, but because He has chosen them as His own.