Mobile battle ground games are widely used in various age groups, there are ocular and cardiac affection that may affect users of this type of action games.

The aim of this study is to assess the possible ocular and cardiac changes that may affect users of this type of mobile games in real life among various age groups and especially in adults with history of recent corona virus (COVID-19) disease. There is no medical recommendations about the time and the hazards of using this games for longer periods in real practice.

Inclusion Criteria:

• Normal subjects that are playing or not playing action mobile battle ground games will be included.
• Post COVID-19 subjects with average 6 months of infection and are playing mobile battle. Ground games will be included.

Exclusion Criteria:

• Subjects that refuse to enter the study.
• Users of mobile battle ground games with other diseases that may affect ocular and cardiac assessment as diabetic eye disease, cardiac congenital anomalies or recent cardiac or ocular surgery.

Subjects that are using action mobile games during their leisure and are members of faculty of medicine, Banha university and are seeking to participate in this study.