Sarvalokaa is one of the best IGCSE international schools in Chennai, affiliated with Cambridge assessment international education. We offer digital learning classes during lockdown. Caring for your child's eyes during online classes:- Increase Text Size on Screen 20-20-20 rule to reduce eye strain Every 20 minutes, take a 20-second break and focus your eyes on something at least 20 feet away. Create sufficient distance between the screen & eyes. Keep Device Just below Eye below. Adjust the brightness of screen.