HƏRBİ ÇAĞIRIŞÇILARDA KERATOKONUSUN ERKƏN DİAQNOSTİKASINDA ŞEYMPFLÜQ KAMERALI KERATOTOPOQRAFİYANIN ROLU VƏ ONUN MÜXTƏLİF MƏRHƏLƏLƏRİNDƏ TOPOMETRIK VƏ TOMOQRAFİK PARAMETRLƏRİNİN QİYMƏTLƏNDİRİLMƏSİ

Xülasə

SUMMARY

Aim – to assess keratoconus detection with Scheimpfug imaging system among military recruits and analyse topometric and tomography parametеrs in different stages of keratoconus.

Material and methods
There were examined 42 recruits at the age of 18-25 years old with suspect on keratoectasia in whom keratoconus was confrmed with keratotopography with Scheimpfug imaging system. None of recruits earlier had been diagnosed the keratoconus. On the base of ocular keratometry the recruits were divided into 4 groups. In each group the following topometric and tomographic parameters for diagnosis of keratoconus with Scheimpfug imaging system were analysed: anterior and posterior central and thinnest pachymetry; front and back corneal elevation at the thinnest corneal point. And there were analysed the data obtained from the software Belin-Ambrosio Enhanced Ectasia Display especially for defnition of keratoconus Da – deviation of normality of anterior surface, Dp – deviation of normality of posterior surface, Dp – deviation of pachymetric progression (i.e. rate of cornea thickness from the thinnest point to the periphery (index of progression), Dt – deviation of normality of thin point of cornea and D – overall deviation of normality.

Results
An analysis of all examined topographic parameters indicates the difference of data in various groups. In III and IV the anormal deviation of all parameters, peculiarly pachymetry progression, was revealed. In the Ì group, despite of high visual functions, the suspective deviation of 2-4 parameters was detected. In the second group these indices were most abnormal. Tomographic analysis of all parameters confrmed the positive correlation between the data for the screening of keratoconus and severity of pathological changes. However, in all cases, even in subclinical and asymptomatic stages of the disease there were found the suspicious and abnormal values for screening of keratoconus.

Conclusion
For the early detection of keratoconus all recruits with suspect on keratoectasia must be examined with corneal topography with Scheimpfug imaging system and the correct interpretation of corneal parameters. The early diagnosis among recruits is very important for estimation of treatment and opportunity to pass the military service.