Critical analysis of visual function evaluating techniques in newborn babies

Campos, Emilio C.; Chiesi, Carlo

doi:10.1007/bf00136458

Cited by 4 publications

(1 citation statement)

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“…Three main techniques are currently used for objective assessment of visual function in children who are too young for standard subjective testing: (1) evaluation of optokinetic nystagmus (OKN) response, (2) forced-choice preferential looking, and (3) visual evoked potentials. 3,4 OKN is the term for a series of reflexive eye movements that are observed even in newborns. [5][6][7] The OKN response to stripes, which move across the individual's field of vision has been used as an objective way of measuring visual acuity for several decades.…”

Section: Introductionmentioning

confidence: 99%

Relationship between optokinetic nystagmus response and recognition visual acuity

Çetinkaya

Oto

Akman

et al. 2006

Eye

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Purpose The aim of this study was to investigate the relation between recognition visual acuity (RVA) and optokinetic nystagmus (OKN) response exhibited to different bar sizes with varying contrast. Methods OKN testing was performed in 52 children aged between 3 and 11 years. The children were evaluated in two groups according to their RVA. Group I consisted of 22 eyes with RVA equal to or better than 0.1 logMAR units. Group II consisted of 30 eyes with RVA 0.2-1 logMAR units. Each subject was seated 60 cm from the screen of Ophthimus s device, and was exposed to consecutive black and white stripes of seven different spatial frequencies (0.08-1.6 cycle/ degree). The narrowest bar that elicited OKN was identified, and then the OKN contrast threshold at this bar size was established. Results Twenty-one of the 22 eyes in Group I, and 26 of the 30 eyes in Group II exhibited 1.6 cycle/degree spatial frequency (P ¼ 0.287). In Group II, 88.9% of the 18 eyes with RVA 0.2-0.5 logMAR responded at this maximum spatial frequency, whereas the corresponding figure for the 12 eyes with RVA 0.6-1 logMAR was 83.3% (P ¼ 0.531). Contrast sensitivity (CS) significantly changed with age in Group I (P ¼ 0.006). When the eyes that responded at maximum spatial frequency in the two groups were compared, the mean CS in Group II was significantly lower than that in Group I (P ¼ 0.005). Conclusions The results indicate no relation between spatial frequency threshold for OKN response and RVA in children. However, the children with RVA deficits had significantly lower CS.

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Section: Introductionmentioning

confidence: 99%

Relationship between optokinetic nystagmus response and recognition visual acuity

Çetinkaya

Oto

Akman

et al. 2006

Eye

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To What Extent is it Possible to Quantify Monocular or Binocular Visual Impairment in Pre-Verbal Children? Role of Clinical Signs and of Electrophysiological and Psychophysical Testing Techniques

Campos

1986

Documenta Ophthalmologica Proceedings Series

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Evaluating the precision of an online visual acuity test tool

Gobira,

Freire,

de Aquino

et al. 2024

J Telemed Telecare

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Objective The aim of this study was to assess the precision of a web-based tool in measuring visual acuity (VA) in ophthalmic patients, comparing it to the traditional in-clinic evaluation using a Snellen chart, considered the gold standard. Methods We conducted a prospective and in-clinic validation comparing the Eyecare Visual Acuity Test® to the standard Snellen chart, with patients undergoing both tests sequentially. Patients wore their standard spectacles as needed for both tests. Inclusion criteria involved individuals above 18 years with VA equal to or better than +1 logMar (20/200) in each eye. VA measurements were converted from Snellen to logMAR, and statistical analyses included Bland–Altman and descriptive statistics. Results The study, encompassing 322 patients and 644 eyes, compared Eyecare Visual Acuity Test® to conventional methods, revealing a statistically insignificant mean difference (0.01 logMAR, P = 0.1517). Bland–Altman analysis showed a narrow 95% limit of agreement (0.22 to −0.23 logMAR), indicating concordance, supported by a significant Pearson correlation (r = 0.61, P < 0.001) between the two assessments. Conclusion The Eyecare Visual Acuity Test® demonstrates accuracy and reliability, with the potential to facilitate home monitoring, triage, and remote consultation. In future research, it is important to validate the Eyecare Visual Acuity Test® accuracy across varied age cohorts, including pediatric and geriatric populations, as well as among individuals presenting with specific comorbidities like cataract, uveitis, keratoconus, age-related macular disease, and amblyopia.

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Critical analysis of visual function evaluating techniques in newborn babies

Cited by 4 publications

References 57 publications

Relationship between optokinetic nystagmus response and recognition visual acuity

Relationship between optokinetic nystagmus response and recognition visual acuity

To What Extent is it Possible to Quantify Monocular or Binocular Visual Impairment in Pre-Verbal Children? Role of Clinical Signs and of Electrophysiological and Psychophysical Testing Techniques

Evaluating the precision of an online visual acuity test tool

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