K R Vinitha, Sreenivas B Sudha, Dr. M R Sreenivas


Background: Ocular perfusion pressure (OPP), a derivative of mean arterial pressure(MAP) and intra ocular pressure(IOP), is a dynamic biological parameter of ocular perfusion. It varies with varying Blood Pressure (BP) and IOP and determines the blood flow to the ocular tissues. Glaucoma is one of the most common causes of irreversible vision loss worldwide. Raised IOP and reduced OPP are the risk factors in the pathogenesis of glaucoma.  It has been observed that Yoga has an impact on these ocular pressures.  Studies carried out on different ethnic groups shows conflicting results regarding the association between glaucoma and ABO blood groups. This study was taken up since there is paucity of literature to establish the link between glaucoma and blood groups in yoga practitioners. 

Objectives: To evaluate the association of IOP and OPP values with ABO blood types in yoga practitioners.

Materials and Methods:  70 adult yoga practitioners in the age group of 18 to 25 years were recruited. Institutional ethical clearance was obtained and written informed consent was taken. Blood groups of the subjects were determined by ABO typing. IOP and BP were recorded using rebound tonometer and sphygmomanometer respectively. OPP was calculated using the formula, OPP = (2/3) mean arterial pressure - IOP.

Results: There was no significant association between ABO blood groups and MAP, IOP and OPP values.

Conclusion: This study aimed at comprehending the effects of risk factors of glaucoma and ABO blood groups in yoga practitioners and it revealed the lack of association between them. This could probably be due to genetic variations in the race and ethnicity.

Key words:  ABO Blood groups, Intra ocular pressure, Ocular perfusion pressure.

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