## 1 Introduction
Attentional focus is very important to expand shooting performance in collective sports such as basketball [27; 28]. Thus, studying the influence of external constraints on the athlete's performance, such as gym noise, is important to help the coach develop strategies that aid athletes in focusing their attention on the shot. If the athlete is distracted by external factors, he looks away from the basket, and thus the accuracy of the shot decreases. According to [PERSON] and [PERSON], external distractions, such as distracting fans or noise, alter the athlete's attention, generate anxiety, and decrease performance, requiring the definition of strategies to alleviate them, such as pre-performance routines and quiet eye training [29]. For example, [PERSON] et al. [30] demonstrated in their study that training techniques can be used to help basketball players to keep their concentration during the game. Some authors argue that professional basketball players develop the so-called quiet eye, which means that the final fixation is located on a specific place or object within at least 3 degrees of visual angle for a minimum of 100 ms [31; 32; 33]. [PERSON] et al. [34] evaluated the influence of the quiet eye on the shooting accuracy of basketball players and found that the longer the duration of the quiet eye, the better the performance of the athletes. In addition, they found that more experienced athletes have a longer duration of a quiet eye and, consequently, better accuracy in throwing, which was also observed by [PERSON] et al. [35]. Defining a specific point on the basket to aim for, during the shot, influences the certainty of the shot, and the experience of the athletes helps to define this point. For example, the more experienced athletes normally choose a point in the front of the hoop, and the less experienced choose the back edge of the hoop or the center of the basket [17]. According to [PERSON] et al. [36], it is complicated to capture and analyze the players' gaze behavior in the case of dynamics sports such as basketball. However, since visual skills are important for shooting during the basketball game, and keeping attention, [PERSON] et al. tried through laboratory studies to develop strategies to obtain success of one's gaze during the game [37]. [PERSON] et al. [38] observed in their study that, with perceptual experience, the use of vision increases the recognition of the relevant action. The influence of external constraints such as limited time, anxiety, attention, and performance during free throw shooting was investigated by [PERSON] [39], who found that if athletes manage to maintain a goal-oriented focus, performance is somewhat influenced. Although several studies address the influence of vision on the certainty of the shot, most of them concerning free throws, according to the authors' knowledge, few studies use specific glasses to evaluate the time and the number of target fixations. The goal of this study was to analyze the effect of basketball shooting in different positions and distances, under the interference of environmental constraints of simulated opposition and gym audience noise, on gaze behavior and performance shooting accuracy. It was hypothesized that there would be an impairment of shooting accuracy and an alteration in gaze behavior patterns of the players when shooting at a longer distance to the basket.