Vislielākais burtu izmērs
Lielāks burtu izmērs
Burtu standarta izmērs
The Study Of Vision And Visual Perception Disorders In School-Age Children; Development Of Diagnostic Methods (2010 - 2013)
Last Update

Nr. 2011/0004/2DP/

General aim of the project:

To develop an effective diagnostics method of school age children vision and visual perception impairments, outside the primary vision care professionals practice places. To improve the overall health and quality of life as a consequence of the research.

Specific aims of the project:

To develop the diagnostics method tool specialized for the school children near vision screening and prophylaxes. Extensive epidemiological study of the visual health and vision screening methods.

In the last three decades public health has faced a new vision health threat, children mania of computer games and movie watching in the portable devices (mobile phones and other media).

Small letters and image size provide the decrease of the reading distance to obtain the necessary retinal object dimensions, sometimes getting as close as 10 cm distance. Even the best 3.5 inch mobile phone displays with the resolution of 480x320 pixels, the near vision load is much bigger, comparing to the standard printed text. The visual stress in this situation is also bigger than visual load working on the computer.

Understanding the risks, developed countries pay special attention to the children vision monitoring, to the development of the new vision screening methods and refraction correction support programs. Epidemiological studies of children vision in USA, Japan, China and Taiwan, and other countries convince than the children sight is impairing. The frequency of the vision problems is higher in the countries with lower GDP for the children of age 12 to 14 (US 20%, Taiwan 28%, China – over 50%).

The higher near vision load and other ecological factors influence also the visual perception of the children and can produce risks for their intellectual development. The Latvian society do not have the specialists articulated explanation, why comparing the reading skills, our students marks are low and fast decrease is observed after the 12 years age. However, the results of the young scientists4 of University of Latvia show that the distance-vision sight is decreased in 30% of the school age students, and 60% of them don't know that they need the refraction to be corrected. 80% of the children in the preliminary school are with the impaired visual acuity in the distance and do not have any eye refraction correction. The near vision is impaired in 10% of the cases and more than a half of these children are not corrected (data of t Riga). The literature and our research indicate that school children need visual functions and specially near vision functions (binocular vision, contrast vision, convergence and accommodation) to be improved, including also vision training.

To understand the situation of the school children refraction and visual perception problems distribution, where there is a need to implement the comprehensive vision screening study. However, over than 200 000 children to be screened by the primary care professionals (optometrist or ophthalmologist) would require not less than 100 optometrists or ophthalmologists and intensive vision examination routine for at least 7 months. We should take into account that the screening should be repeated after 3 or 4 years. The overall time of one vision check can be reduced three times, if one applies a specialized screening apparatus. However, this would require the extensive material investment (at least 3000 LVL) in each practice.

The lack of information in the social area (specially, parents and teachers) about the vision impairment and its prophylaxes is a problem unsolved. We offer a project which includes the possibility to run the vision screening by a non-vision specialist, with a digitally via Internet provided screening software, supplied with designed accessories (filters and lenses sets). As a result only 30% of the school children would be sent to the vision care specialists for the more detailed vision testing that would help to save the expenses for the device purchase and workforce.


1.1. School children vision screening with standard screening procedures and commercially available devices.

1.2. Compatibility research of colour filters and display’s characteristics for creation of visual stimuli.

1.3. Usability of the developed filters and chromatic stimuli for binocular vision testing and visual perception researches, development of methodology.

1.4. Development of methodology for diagnostic of school children vision perception problems.

1.5. Epidemiological study of school children vision prophylaxes.

1.6. Examination of the children with decreased visual functions, eliminated in the vision screening process, by the eye care professionals – optometrists or ophthalmologists.

1.7. Development and approbation of diagnostic methodology and screening device prototype.

2. public availability of the study results:

2.1. Vision screening diagnostic methodology implementation in schools.

2.2. Public availability maintaining of the results.

2.3. Public availability maintaining of the statistics.

2.4. Publication of the results.

3. strenghtening the property rigths of research results:

3.1. Preparation of the Patent application.

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