By and large, yes. Myopia is a risk factor for retinal detachment. Myopia determines eye anteroposterior lenghtening.
Retina has to lenghten to cover a wider area, so it gets thinner and can easily display stretchmarks and weaker portions. For the same reasons, vitreum detachment is more frequent and premature.
In case of high degree myopia, it is best to periodically schedule ophthalmologic visits in order to identify degenerative areas (weak area) on the retina. These portions can be isolated with a laser treatment. If there a re no degenerative areas, laser treatment is not the best option.
By and large, no.
The crucial moment happens during the first hours and, in some cases, during the first days after the detachment; after that period of time, the risk of retinal lesions quickly lowers. Corpus vitreum can detach because of the patients’ age, especially if it dehydrates or in patients affected by myopia, because it stretches as the eye grows in size.
The most common symptom of corpus vitreum detachment is the appearance of a moving dot, also described as a mosquito that stand in front of the eye.
The presence of few dots in the field of vision is harmless and common; if those appear suddently, that could be the start of the corpus vitreum detachment, or a retinal lesion.
It is best to book an ophthalmologic appointment as soon as possible in case of new symptoms or the worsening of pre existing ones. A seasoned ophthalmologist will advice you on what’s best.