You have not mentioned the condition for the hard contact lens had been recommended. Hard contact lenses can improve vision for people with myopia, hyperopia, and astigmatism. If the corneal surface is irregular, hard contact lenses often provide a smooth refracting surface and thus improve visual acuity noticeably more than soft contact lenses or eyeglasses. For complete wearing comfort, hard contact lenses require an adaptation period, sometimes as long as 1 week to 2 weeks. The users should have tolerance and it cannot be worn for longer periods due to its low oxygen permeation to the cornea. During this time, the wearer gradually increases the number of hours the lenses are worn each day. Importantly, no pain should occur at any time. Pain is a sign of an ill-fitting contact lens or corneal irritation. Wearers usually experience temporary (< 2 h) blurred vision (spectacle blur) when wearing eyeglasses after removing rigid contact lenses. We guess that your doctor wants to correct your vision at young age. There are new Rapid permeable lens that have come up in the market for better oxygenation of cornea. You can try that asking your doctor or choose a soft lens though.