Complex sentence: Large epithelial plugs may cause more scattering of light, leading to the appearance of visual phenomena such as flares and starbursts--especially in situations like night driving, where the stark glare of car headlights abounds.
Split into simpler sentences: Large epithelial plugs may cause more scattering of light, leading to symptoms of flare and'starbursts'. This can happen especially in situations like night driving, where the stark glare of car headlights abounds.