Aim: To determine the relationship between myopia and intraocular pressure at the University of Port Harcourt Teaching Hospital(UPTH), Nigeria with a view to reduce progression of myopia by controlling their intraocular pressure. Methodology: The control and study subjects were sampled from patients attending UPTH who had no history of trauma, intraocular surgeries or contact lens wear. They were further examined using the Keeler direct ophthalmoscope, 78D lens and slit lamp biomicroscope and those without cataract, glaucoma or posterior segment lesions were chosen. Their visual acuity (VA) was then assessed. Those with VA of 6/6 or better and those who have improvement with pin hole were selected. These patients were refracted using autorefractor (Carl Zeiss meditec) and subjectively with trial lens box. They were categorised into; emmetropia (Plano), low myopia (−3.0D<Spherical Equivalent (SE) myopia (SE −0.5D), moderate myopia (−3.0DSE<6.0D) and high −6.0D). The myopes were the cases while the emetropes were the control. The radius of corneal curvature (RCC) was measured with the keratometer (Carl Zeiss meditec keratometer). IOP was measured between 9am and 12pm using Perkins applanation tonometer (MK2 Model). The axial lengths (AL) were measured with an A scan (Pascan 300A Digital biometric reader). The central corneal thickness (CCT) was measured using ultrasound pachymeter (IOPAC (Heidelberg engineering).