Couple other points:
Re to "bad eyes", "blindness", etc, especially in the older literature: please do not be a literalist when it comes to such terms: sure, it MIGHT be a literal vision trouble or bad eye, but MORE OFTEN we should take these terms as ANALOGIES: blindness, for example, means not being able to SEE what's right there in front of a person; "vision" by analogy can mean insight, seeing things in their real light, etc; so, when using the older literature (and especially the literature relating to the fixed stars) use ANALOGY in deciphering what the texts are saying, particularly relative to sight, eyes, blindness, and related terms.
Re to retrograde: Vedic astrology considers the powers of a planet INCREASED when it is retrograde; now, I do lean somewhat in this direction as well, but I also consider that a planet is "self-conflicted" when it is retrograde, meaning that although its powers might be increased, there is also difficulty of various types, connnected with that retrograde planet.
Re to "bad eyes", "blindness", etc, especially in the older literature: please do not be a literalist when it comes to such terms: sure, it MIGHT be a literal vision trouble or bad eye, but MORE OFTEN we should take these terms as ANALOGIES: blindness, for example, means not being able to SEE what's right there in front of a person; "vision" by analogy can mean insight, seeing things in their real light, etc; so, when using the older literature (and especially the literature relating to the fixed stars) use ANALOGY in deciphering what the texts are saying, particularly relative to sight, eyes, blindness, and related terms.
Re to retrograde: Vedic astrology considers the powers of a planet INCREASED when it is retrograde; now, I do lean somewhat in this direction as well, but I also consider that a planet is "self-conflicted" when it is retrograde, meaning that although its powers might be increased, there is also difficulty of various types, connnected with that retrograde planet.