Correlations between visual fixation parameters, photosensitivity of the retina and visual acuity in various types of amblyopia

Evaluation of fixation characteristics in amblyopia using microperimetry

“…The frequency of eccentric xation was higher in strabismic and combined amblyopia than in anisometropic amblyopia. The preferred xation eccentricity was greater in amblyopic eyes than the non-amblyopic eyes, and there was a negative correlation between preferred xation eccentricity and BCVA A decrease in xation stability of the amblyopic eye [5-9, 13, 14, 19, 21-23] and a positive correlation between BCVA and xation stability have been reported in many studies [7,8,10,15,19,25]. Similarly, in our study, xation stability was found to decrease in the amblyopic eye, and it was found to be signi cantly worse than the non-amblyopic eyes.…”

“…Microperimetry (MP) is a technique that can simultaneously perform the morphological and functional evaluation of the retina and analyze the function of different regions of the retina. It allows us to evaluate the average threshold macular sensitivity (AT) and xation characteristics of both the amblyopic eye and the non-amblyopic eye and gives us detailed information about the visual function [5][6][7][8][9][10]. It provides detailed information about xation stability and preferred retinal locus or loci (PRLs), if any, in the tested eye by continuously recording eye movements during the examination [8,11].…”

“…Today, MP is mainly used to evaluate the effect of medical and/or surgical treatments in macular pathologies such as age-related macular degeneration, to determine the stability and location of xation in low vision rehabilitation, and for biofeedback xation training (BFT) [11,12]. In recent years, it has been used in different elds such as amblyopia, binocular visual function, and evaluation of oculomotor disorders, and it has been shown that bene cial results are obtained [5,6,[8][9][10][13][14][15][16]. Wang et al [16] reported that MP was an effective device for measuring xation characteristics in the diagnosis and follow-up of amblyopia patients with eccentric xation, and Tarutta et al [10] stated that it is an innovative tool to evaluate the e cacy of treatment in amblyopia types.…”

“…In recent years, it has been used in different elds such as amblyopia, binocular visual function, and evaluation of oculomotor disorders, and it has been shown that bene cial results are obtained [5,6,[8][9][10][13][14][15][16]. Wang et al [16] reported that MP was an effective device for measuring xation characteristics in the diagnosis and follow-up of amblyopia patients with eccentric xation, and Tarutta et al [10] stated that it is an innovative tool to evaluate the e cacy of treatment in amblyopia types. In various studies, loss of contrast [17], loss of retinal sensitivity [7,8,[18][19][20], decrease in RNFL thickness [7,21], visual eld defects [7,8,18], and decrease in xation stability [5-9, 13, 14, 19] in the amblyopic eye have been reported.…”

Evaluation of fixation characteristics in amblyopia using microperimetry

“…Because in studies, it was observed that the increase in visual acuity in the amblyopic eye was accompanied by an increase in xation stability after treatment [8, [32][33][34][35]. However, it is still controversial whether visual acuity affects xation or xation stability affects vision [10]. In clinical practice, it was reported that the evaluation of xational eye movements should be questioned in amblyopias that do not respond to classical amblyopia treatments such as glasses, occlusion, and atropine [33].…”