Do near sightedness or astigmatism affect sclera show? What are my options to reduce its appearance? (photo)

I am 19 years old and suffer with near-sightedness in both eyes and astigmatism in my right eye. alongside having naturally quite prominent eyes. Would these factors contribute to scleral show as I’m concerned about whether it is caused by something more serious and how can i reduce this as it is a big insecurity