Soccer heading leads to temporary impairments in visual tracking and saccadic eye movement, affecting a player's ability to follow a moving object (Caccese et al. 2018). (American Journal of Sports Medicine, 46(14), 3465-3473).

Repeated head impacts can alter ocular-motor control, leading to slower reaction times and difficulties in gaze stabilisation (Rutherford et al. 2009) (British Journal of Sports Medicine, 43(10), 829-834).

Frequent heading affects binocular vision, reducing depth perception, which is crucial for accurately judging distance during play (Gysland et al. 2012) (Clinical Journal of Sport Medicine, 22(1), 45-50).

MRI scans showed that white matter changes in the temporo-occipital region of the brain, caused by frequent heading, may contribute to deficits in spatial awareness and visual perception (Lipton et al. 2013) (Radiology, 268(3), 850-857).

The PC is responsible for decision-making, attention control, and working memory (Miller & Cohen, 2001, Annual Review of Neurosciences).

Neuroimaging studies suggest that football heading may lead to functional disruptions in the PC, affecting cognitive control and response inhibition (Lipton et al, 2013).

Reported that soccer players who frequently head the ball showed reduced accuracy in tracking moving objects, potentially affecting their ability to judge the speed and trajectory of the ball (Rodrigues et al. 2016) (Frontiers in Neurology, 7, 38).

Found that repetitive heading leads to temporary impairments in binocular vision, which affects depth perception (Gysland et al. 2012) (Clinical Journal of Sport Medicine, 22(1), 45-50).

Showed that players who headed the ball multiple times had delayed visual responses, making it harder to judge distances accurately (Caccese et al. 2018) (American Journal of Sports Medicine, 46(14), 3465-3473).

Demonstrated that heading can disrupt vestibular function, leading to temporary balance and postural control issues (Haran et al. 2013) (International Journal of Sports Medicine, 34(4), 350-354).

Found that youth players exhibited short-term dizziness and instability post-heading, likely due to disruptions in sensory integration (Press et al. 2017) (Medicine & Science in Sports & Exercise, 49(9), 1899-1905).

The occipital lobe processes visual stimuli, while parietal lobe integrates spatial information and movement coordination (Goodale & Milner, 1992, Trends in Neurosciences).

Research suggests that repeated impacts from heading may impair the functional connectivity between these areas, leading to deficits in visual motion tracking and spatial judgement (Lipton et al., 2013).

Start with a broader context: The introduction begins a little abruptly. Consider opening with a few sentences about the significance of heading in football and how it's an integral part of the sport. You might then introduce the emerging concerns, supported by evidence, around increased risks of neurological issues—such as dementia—in players who frequently head the ball. This will help ease the reader into the topic more naturally.

Structure and flow: At the moment, the content jumps between different effects of heading (e.g., cognitive, visual, saccadic). It would strengthen your argument to first discuss the broader cognitive and motor impacts of heading, then move into effects on vision and perception, and finally focus specifically on microsaccades. This progression will make your argument more cohesive and easier to follow.

Research gap: There's no need to include a separate 'Research Gap' section. Instead, try to weave this into the final part of your introduction. You can use this space to clearly highlight what’s currently unknown or underexplored, and how your project addresses that gap.

Referencing: Lastly, please make sure all your references are primary sources and follow a consistent referencing style throughout. At the moment, there are some inconsistencies that need tidying up.