Cataracts can develop for a number of reasons. They are more common later in life as the structure of the lens changes. They can also develop as a result of trauma to the eye. As the lens becomes cloudy it can affect vision at all distances and can make certain lighting conditions more difficult. When updating a persons glasses prescription no longer gives them the vision they require the patient may then qualify for surgical correction/removal of the natural lens and replacement with an Intra-Ocular Lens implant.