# 1- The energy transferred from the anterior chamber of the eye through the corneavaries considerably depending on whether a contact lens is worn. Treat the eyeas a spherical system and assume the system to be at steady state. The convectioncoefficient ho is unchanged with and without the contact lens in place. The corneaand the lens cover one-third of the spherical surface area.T heT hAnteriorchamberContactlensCorneaare as follows:Values of the parameters representing this situationr 10.2mm, r 12.7 mm, r3= 16.5 mm, Teoj= 37°C, Teoo = 21°C, ki = 0.35W/m.K, k2 0.80 W/m.K, h 12 W/m2.K, ho 12 W/m2.K.(a) Construct the thermal circuits, labeling all potential and flows form the systemsexcluding the contact lens and including the contact lens. Write resistanceelements in terms of appropriate parameters(b) Determine the heat loss from the interior chamber with and without the contactlens in place(c) Discuss the implication of your results.

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Step 1

Consider the system as the eye without the contact lens and observe there are three thermal resistances arranged in series with each other namely convection resistance on the Anterior side of the eye, conduction resistance due to the cornea and convection resistance on the outside of the eye.

Write the expression for the convection resistance on the anterior side and the exterior side of the eye considering the fact that it the heat transfer is occurring from only one third of its total surface area.

Step 2

Similarly, write the expression for conduction resistance offered by the cornea of the eye by considering the fact that it only covers one third of the total surface area of the eye.

Step 3

Draw the thermal circuit for the system ...

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