In regard to injuries relating to lighting strikes, there are four main ways you can be hurt:
-Direct hit. Self-Explanatory.
-Grounded to something else that was hit. The effects depend on what the conductor was that the lighting hit. If it was metal or water, for example, then it's likely to have nearly the same effect as a direct hit, varying by how much of your body surface is in contact with the substance that was hit.
-"Splash," where a nearby object gets hit and the electricity travels to you, but though the air rather than another conductor like described in the above point.
-Electromagnetic Pulse (EMP, or called LEMP when from a lightning strike.) This happens when you are near a strike, and is a bit more different than the earlier three. It is a form of radiation.
It sounds like what you are describing is a splash, though it could also be from being grounded to an object/surface that was hit. It may sound like EMP is what you are describing, but not really. EMP damage doesn't really have the immediate effects on people like the symptoms you are describe; it mostly just damages electrical appliances. There is support to say that exposure to EMP in humans can cause damage to the left side of the brain, but again, this doesn't have a high correlation to what you're describing (though all lightning injuries--or electricity for that matter--is primarily neurological.)
With the two options, the grounded option would typically be more similar to a direct strike, though of course this would depend on the object hit itself. Most lighting injuries are from this, as only 3-5% of lightning strike injuries are from direct hits. When it makes a jump, whether through an object or air, the distance between the two doesn't matter hardly at all. It mostly has to do with the conductivity of the materials, and even people have different resistances to electricity depending on factors such as body composition and how hydrated they are. Currents from lightning strikes are shown to often travel distances as high as 90 feet. So if this is the case, it would be impossible due to the many factors to determine the distance between you and the direct spot where the lightning struck.
If it was from a "splash," then what would've happened was that the lightning hit something taller than you that was within one or two feet from you. Energy is not created or destroyed, so this happens when there isn't any place for the current to go once it hits so it has to escape to another vessel--you. Again, due to your own resistance, you can't pinpoint exactly the distance, but if it was a splash then it's a lot more specified.
As for your symptoms, currents often go through facial orifices when they travel through people--as in eyes, ears, nose, etc, and then encounters the brain, especially brain stem, resultantly the central nervous system as well, and often the lungs. This also will be affected greatly, however, by where the current entered through, the person's resistance, what they're touching and with what body part, etc.
The electrical energy often affects the person in the form of heat energy, causing burns, and shock waves which will take the form of kinetic energy. Often the damage to the eyes or ears are from the shock wave. Though eyes (ears as well) can also be damaged because they do not conduct well, so the heat transferred when they are met with a current will also damage the eyes.
There are also other damages that may occur when current travels through that area of the body. Frontal lobe damages resulting in irritability and personality changes, memory troubles, central nervous system damages, scalp burns, chronic pain, and many others. The extent to which the person is affected is not very predictable from the nature of the strike, again because there are so many factors.
As for long term effects, lightning injury may lead to cataracts, or less commonly other eye damages, ruptured ear drums, and neurological damages that aren't immediately noticeable when struck. If you haven't, I suggest you get an evaluation from a doctor, and an optician as well to make sure that your eyes will not receive more damage (if even you're no longer blinded, it can still signify damage that may get worse over time.) Dr. Permesh Dhillon, regarding a case states that "In the future, if patients are struck by lightning, it should be a routine process to refer them to an ophthalmologist to have an eye assessment."
