Spanish to English Art/Literary Art, Arts & Crafts, Painting

Hello everyone,
To give you some background, I work in Italian>English and was asked to translate an essay that, in turn, had been translated from Spanish. My Spanish is pretty rusty but passable in a pinch, so I asked for the original files just in case something was unclear.
There was a bit that didn't look quite right to me, as the Italian translator used a term akin to "limited nature" or "narrowness", setting it in quotation marks.
I checked the original and the term used was "acheco 'miope'".
The artists were asked to create paintings that are just 10 x 12 cm, so I think the author is emphasizing the fact people must view the paintings from a very short distance.
Can someone confirm my hunch that "limit nature" or "narrowness" doesn't quite capture the original concept? Or confirm, inversely, that "narrowness" does work?
I apologize for the lengthy posting, but felt it was essential to explain.
MTIA,
Catherine

Here's a long passage to provide context.

Someter sus fantasías a telas encajadas en bastidores de 10 por 12 centímetros. La mayoría se atuvo a la rigidez del formato, y los menos se desbordaron de la tela hacia los marcos y más allá ....
Pero además el mínimo formato -lo he visto así en los lugares públicos donde cuelgan- produce una sorprendente innovación en la atención de la mirada. *** El acecho “miope” *** de la tela posee una convocatoria participativa de la que carece el cuadro normal. No permite el divagar de paso, reclama la atención de los espectadores con la autoridad de un duende.