Strange, but it appears that external sense objects can exist independently of consciousness and attention...If, friends, internally the eye is intact but no external forms come into its range, and there is no corresponding conscious engagement (tajja samannāhāra = attention), then there is no manifestation of the corresponding section of consciousness. If internally the eye is intact and external forms come into its range, but there is no corresponding conscious engagement, then there is no manifestation of the corresponding section of consciousness. But when internally the eye is intact and external forms come into its range and there is the corresponding conscious engagement, then there is the manifestation of the corresponding section of consciousness.
MN 28
Rather than saying that the external sense objects are dependent on consciousness, MN 28 flips the equation the other way -
It's a bit unfortunate that the passage preceding the above 2 has been rendered too idiomatically into English. What we have as -cont'd from above -
The material form in what has thus come to be is included in the material form aggregate affected by clinging. The feeling in what has thus come to be is included in the feeling aggregate affected by clinging. The perception in what has thus come to be is included in the perception aggregate affected by clinging. The formations in what has thus come to be are included in the formations aggregate affected by clinging. The consciousness in what has thus come to be is included in the consciousness aggregate affected by clinging. He understands thus: ‘This, indeed, is how there comes to be the inclusion, gathering, and amassing of things into these five aggregates affected by clinging. Now this has been said by the Blessed One: “One who sees dependent origination sees the Dhamma; one who sees the Dhamma sees dependent origination.” And these five aggregates affected by clinging are dependently arisen.
is actually more involved -Friends, just as when a space is enclosed by timber and creepers, grass, and clay, it comes to be termed just ‘house,’ so too, when a space is enclosed by bones and sinews, flesh and skin, it comes to be termed just ‘material form.’
Instead of just a simple painting of bones, sinews, flesh and skin being the constituent of the form aggregate, it actually says that the form aggregate is paṭicca (dependent) upon these 4 things.Seyyathāpi, āvuso, kaṭṭhañca paṭicca valliñca paṭicca tiṇañca paṭicca mattikañca paṭicca ākāso parivārito agārantveva saṅkhaṃ gacchati; evameva kho, āvuso, aṭṭhiñca paṭicca nhāruñca paṭicca maṃsañca paṭicca cammañca paṭicca ākāso parivārito rūpantveva saṅkhaṃ gacchati.