Diagnostic testing in infants under 1 year of age
According to ophthalmologists, new born babies have very low vision acuity — within the range of 0.005 to 0.015 D. During the first few months, this acuity slowly grows to 0.01–0.03 D. By the age of 2, vision acuity rises to 0.2–0.3 D and reaches 1.0 D only by the age of 6–7 years.
Regular visits to an ophthalmologist from an early age are no less important than regular vaccinations and visits to a pediatrician. The first examination of a child’s vision is done at the maternity home with the aim of finding innate disorders (cataract, tumour of retina (retinoblastoma), glaucoma, various inflammatory disorders). Prematurely born children undergo compulsory examination with the aim of excluding retinopathy and atrophy of the optic nerve.
The first year of a child’s life is the period of intensive development of vision therefore it is important to see an ophthalmologist at the age of 1 month, 6 months and 1 year.
A unique instrument at the Excimer Eye Clinics
The Excimer Eye Clinics have put into operation a new instrument – the PlusOptic A09 paediatric autorefractometer which makes it possible:
- to measure refraction of eyes;
- to analyze the cornea reflex (symmetric or asymmetric);
- to measure the diameter of the pupils of both eyes and the distance between them;
- to draw up an outline of sight fixation.
A unique feature of the PlusOptic A09 autorefractometer is its ability to provide precise binocular refraction measurements from a distance of 1 meter without expansion of the pupil. The instrument measures both eyes simultaneously.
What patients may require testing with the PlusOptic A09 autorefractometer?
The PlusOptic A09 paediatric auto-refractometer allows to measure refraction in children of any age (including new-born babies), also children with nystagmus and patients with complications.
How does the PlusOptic A09 paediatric autorefractometer operate?
Measurements performed by the PlusOptic A09 autorefractometer are based on the principle of photosciascopia (infrared rays). It should be noted that infrared rays is harmless to eyes of a child. It is part of the day light and invisible for eyes.
In the course of examination, infrared light is projected on the retina via the pupil. Depending on the error degree of the refraction, the reflected bright light forms a special bright image inside the pupil. The spherical reflection is calculated on the basis of this crescent-shaped image. Identification of the cylinder and axis is based on the same procedures in three meridians.
Testing as a game!
Diagnostics of children, particularly those of very early age, are always a difficult affair. Unlike adults, a small child cannot fulfill all of the doctor commands, he turns his head, does not sit quiet and is unable to concentrate his gaze for a long period.
All measurement with the PlusOptic A09 autorefractometer are conducted in the form of a game. The instrument chamber releases a special sound to attract the attention of the child and the screen shows a smiling face. Refraction measurements do not take much time – hardly a few seconds, and are performed by the non-contact method. The child is not tired and feels no discomfort.
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