I've just been told i have a corneal dystrophy?

yesterday i could see fine, this morning i woke up, nothing seemed unusual then i put my gles on and my right eye was blurry, i rubbed my eye a bit thinkng it was just what everyone sometimes gets but it was still the same so i went to the bathroom and rinsed out my eye a couple of times but it was still the same, so i went to the dr who had a look and said it looked ok but i should see the optician as soon as possible, so i made an appointment for today, they took a picture of the inside of my eye which they said was perfect then he got the thing with a light and got close having a look all round the eye and said he could see something on the cornea so he got some dye and then got a better light thing and had another look and said i have a corneal dystrophy, he said it was strange that it had just happened over night, but said my vision shouldnt get any worse, and i have to see a specialist, i'm really worried now that it is something really very bad, i have had no other symptoms, last night before i went to bed i could see perfectly fine through my gles, its just all of a sudden... has anyone else got a corneal dystrophy? what is the prognosis? i also see slight ghosting through the affected eye even with my gles on. please anyone with experience i'd appreciate some urance that im not gonna go blind or anything!! i;m ony 29!