Table:
Cataract

Magnified view of a cataract seen on examination with a slit lamp
Specialty	Ophthalmology
Symptoms	Faded colors, blurry vision, halos around light, trouble with bright lights, trouble seeing at night[1]
Complications	Falling, depression, blindness[2][3]
Usual onset	Gradual[1]
Causes	Aging, trauma, radiation exposure, following eye surgery[1][4]
Risk factors	Diabetes, smoking tobacco, prolonged exposure to sunlight, alcohol[1]
Diagnostic method	Eye examination[1]
Prevention	Sunglasses, not smoking[1]
Treatment	Glasses, cataract surgery[1]
Frequency	60 million (2015)[5]

Based on the provided table, find the positions of cells with the subsequent values. Return their locations using the JSON format {'value': '<cell value>', 'location': (row number, column number)}, starting from 1 for both row and column number. Denote the location as 'DOES NOT EXIST' if a cell does not exist in the table.
The target cell values:
1. 'Prevention';
2. 'Eye examination';

The target cell locations are as follows:
1. {'value': 'Prevention', 'location': (9, 1)}
2. {'value': 'Eye examination', 'location': (8, 2)}