stage of pregnancy can increase the average weight of about 11 kilograms, and the body more than the storage of about 6.5 liters of water. The cornea contains 70 percent water, it is the eye the first half of pregnancy by increasing the impact of water as part of the largest. Based on that the corneal thickness during pregnancy an average of about 3 percent, and more to the end of pregnancy, the more obvious increase in corneal thickness.

On the other hand, the sensitivity of the cornea during pregnancy is lower, which is unrelated to the increase in corneal thickness, however, will affect the corneal reflex and the function of eye protection, a phenomenon in the production of six to 8 weeks can be back to normal. Curvature of the cornea during pregnancy will be some changes, and more obvious in late pregnancy, changes in corneal curvature will make the right to wear contact lenses had become inappropriate.

pregnancy also affects the tear film quality and quantity of the end of pregnancy about 80 percent of the women tear secretion is reduced (mainly inadequate secretion of liquid layer of water). And eyelid edema during pregnancy layer easily lead to inflammation of the eyelid, damage to the secretion of oil layer, the tear film layer of water more liquid evaporation. Therefore, the amount of tears to reduce tear film instability and the quality, easily lead to dry eye symptoms, the impact of wearing contact lenses.

pregnancy conjunctiva of the eye will make the impact of the conjunctiva and the contraction of small blood vessels spasm, leading to reduced blood flow. On the lens increase the penetration of moisture will make crystal steep curvature change, the eyes will increase the degree of myopia, making the original contact lens suitable degree has become inadequate, leading to see what will be blurred.

about 30 percent of pregnant pregnant women women have to wear contact lenses problems that the most important thing is uncomfortable to wear contact lenses (especially hard contact lenses), and other greasy surfaces such as contact lenses that increase the level of (the reactor is mainly the accumulation of mucus, often feel the existence of contact lens wear time than usual shortening, etc., so during pregnancy to reduce the number of contact lens wear and time, especially in the last three months of pregnancy, it is best to avoid wearing contact lenses and wear ordinary glasses.

if the usual There is a box of ordinary wear glasses during pregnancy should not wear contact lenses, if not the original does not wear contact lenses, then the early pregnancy may continue to wear, but the best time to reduce the wear, but in a clean We will step up (because the lens will increase the deposition).