Progressing visual impairment is not necessarily a contraindication for a laser vision correction. However, the error should be stable for at least a year. The progress reported by you is not that big, but we still would need more information (e.g. your age) to fully answer your questions. What is more, it would be best if you could come for a qualifying examination which would additionally help to rule out any contraindications. Specialist medical tests and full anamnesis will help to determine whether you are a good candidate for a laser vision correction.