A grapple check is none of the things that the 'blinded' condition affects, so grapple checks are consequently unaffected by said condition. Grapple checks don't "rely on vision" any more than any other ability that doesn't say it relies on vision, at least as far as the rules are concerned, so blinding an opponent in a grapple where each character is solely making opposed grapple checks won't have any effect on that grapple.
(The following section is only relevant if you feel like arguing with the above. If not, feel free to ignore it; nothing changes the above blanket non-application)
One might initially think otherwise, should they misinterpret:
A grapple check is like an attack roll.
But only if they ignore the next sentence:
Your attack bonus on a grapple check is:
Base attack bonus + Strength modifier + special size modifier
The game is (badly an inaccurately) trying to tell you that a grapple roll is a d20 roll you add similar stuff to as an attack roll. When the game uses 'is like' to make something a copy of something else, dependent on that other thing for its own description, it uses 'is like... except'. That's important because 'is like' doesn't at all imply that two things are exactly the same, only that they have at least one trait in common. 'is like... except' implies that the list of exceptions is exhaustive.
If one were to ignore the rules text and rule otherwise, as e.g. the Sage does in the following exchange:
[Q] Earlier, you talked about Bob the fighter, who was
unconscious and later woke up, prone, to find Grog the orc
standing in his space. You said Bob has to stay prone so
long as he remained in Grog's space, and that Bob would
provoke an attack of opportunity upon leaving that space.
Suppose Bob made a grapple attack on Grog? He can
grapple Grog, can't he? Bob would be at a negative for
being prone but would not provoke an attack of
opportunity, would he? Assuming Bob establishes a hold on
Grog, how long does the prone penalty last?
[A] Sure, Bob can grapple Grog. Bob's initial grab attack
provokes an attack of opportunity from Grog unless Bob has
the Improved Grapple feat or some other circumstance prevents
Grog from threatening Bob. (For example, Grog would not
threaten Bob if Grog were wielding a reach weapon.) If Grog
deals damage to Bob with an attack of opportunity, Bob's
grapple attempt is over.
If Grog doesn't damage Bob, Bob's initial touch attack
would suffer a –4 penalty for being prone. If the grab succeeds,
Bob is still prone and still suffers the –4 penalty for being
prone for the ensuing opposed grapple check.
Then one is making a grave precedential error: the same language is used all over 3.5 for things that are even more dissimilar! For example, ruling this way may render Saving Throws subject to True Strike:
Generally, when you are subject to an unusual or magical attack, you get a saving throw to avoid or reduce the effect. Like an attack roll, a saving throw is a d20 roll plus a bonus based on your class, level, and an ability score. Your saving throw modifier is:
Base save bonus + ability modifier
And certainly makes spell resistance weird:
The defender’s spell resistance is like an Armor Class against magical attacks