Effects of Forward Head Posture Correction on Visual Acuity and Fatigue in Low Level Visually Impaired University Students

In recent years, the increasing use of modern technology has raised concerns about its potential impact on our visual health. However, research suggests that in addition to these factors environmental factors such as near work, visual stress, educational stress and acquired false head posture may have a greater impact on visual health of young adult population. Prolonged use of digital devices can cause digital eye strain, leading to symptoms such as headaches and blurred vision. However, poor posture can also cause strain on the eyes, leading to decreased visual acuity and compromised performance. It is essential to consider factors such as posture when assessing visual performance in university students, in addition to the impact of modern technology. The forward head posture (FHP) is the head movement that occurs from poor postural awareness and frequently leads to muscle imbalance and discomfort.

University students frequently experience a forward head position, especially those who spend a lot of time studying or using computers. Both forward head posture and visual impairment are more prevalent among university students. It has been found that 63.96% of university students, including both genders, exhibit a prevalence of forward head posture. . A 2019 study in America found that 67.8% of university students experience visual fatigue, with blurred vision being the most commonly reported symptom (27%). This suggests many students may have mild visual impairments, impacting their academic performance and quality of life. The existing research has mainly concentrated on studying visual impairment by defining specific levels of impairment such as 'moderate' and 'severe.' However, it is plausible that even a minor reduction in visual acuity, also known as 'mild' visual impairment (ranging from 20/30 to 20/70), could have a subtle but significant impact on an individual's ability to cope with activities of daily life. The position and movement of the head play a crucial role in visual perception, as the somatosensory system of the neck is intricately connected to the visual system. Spending most of the time using computers, mobile phones and reading can cause biomechanical alterations that make it difficult to keep a neutral head position and compromise the structural integrity .The Centre of Gravity (COG) of the head moves in anterosuperior direction as a result of this structural integrity compromise, increasing the stress on the neck. Each inch that the head is moved forward or anteriorly from its neutral position adds approximately 10 pounds (4.5 kilograms) of extra weight to the cervical spine.