The new Touch Edition shows that Sony has solved its earlier problem of adding another layer to the screen that makes the display less readable.

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"If there is only a problem in its inner layer, it may be possible to replace just that part of the cornea, leaving the patient's normal and healthy tissue in place, " said Mr Muhtaseb, a Singleton-based consultant ophthalmologist.

BBC: New eye surgery shortens recovery

The first problem was that the equity layer was far too thin, and that banks were wary of imposing losses on holders of hybrid debt.

ECONOMIST: Bank bondholders

The problem, however, is that the silicon layer is amorphous, rather than crystalline.

ECONOMIST: Just press print

Kindle Fire HD solves this air gap problem by laminating the touch sensor and the LCD together into a single layer of glass, creating a display that's easy to view even in overhead light, and reducing glare by 25% relative to iPad 3.

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The problem was that (gas) was locked in shale, the extremely dense layer of rock under Dallas and Forth Worth.

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