Table 10.

Main groups of citation network of subcluster in group 2.

Subcluster	1	2	3
Number of publications	29	16	15
Number of citation links	69	40	22
First publication	Sherman, 1980 [55]	Applegate et al., 1992 [67]	Stine et al., 1982 [39]
Most cited publication	Abernethy et al., 2001 [24]	Applegate et al., 1992 [67]	Stine et al., 1982 [39]
Most recent publication	Jorge et al., 2019 [66]	Vera et al., 2020 [56]	Schumacher et al., 2019 [68]
Main keywords	Vision training, exercise, movement	Visual acuity, visual impairment, perception	Anticipation, reaction time, strategies
Topic of discussion	Evaluating the efficacy of sports vision training programs	Importance of the optimal visual acuity in the field	Comparison between the visual skills of athletes and non-athletes
Conclusion	Visual training allows for improvements to be made in terms of the visual skills of athletes, leading to greater precision in the playing field. However, there is a great controversy as to whether this training actually helps improve the on-field performance; therefore, further scientific evidence is required.	A reduction in visual acuity does not have a significant influence on sports performance. The motor–perceptual system is capable of compensating for this.	Athletes demonstrated better visual skills than non-athletes. Likewise, they presented stereopsis and a more developed visual field.