the goal of this study is to Investigate the correlation between neck pain and visual disturbances in smartphone users.

Study design:

Cross-sectional observational analytical study design conducted on smartphone users 2- Subject selection 141 subjects (who are smartphone users) according to sample size calculation will be selected randomly to complete the neck disability index and visual functional questionnaire 25 version 2000

Inclusion Criteria:

• 141 subjects who are smartphone users
• Age between 18 to 50 years
• Both genders are included
• Subjects Who put in more than 4 hours a day using smartphone
• Participants without systemic illnesses or physical deformities were also included
• Consent: Participants who provide informed consent to participate in the study.
• Neck disability index will be used to assess how your neck pain has affected your ability to manage in everyday life.
• Visual Functioning Questionnaire version 2000 will be used to assess vision-related quality of life

Exclusion Criteria:

• People with head and neck injuries
• eye diseases
• People with diabetic retinopathy
• who had refractive correction surgery
• psychiatric problems (depression)
• people with systemic illnesses or physical deformities
• people who have vision impairments and disabilities

participants from universities and local population